Add docs for new 7.23.0 plugins

docs/plugin-proposal-import-defer.md

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+---
+id: babel-plugin-proposal-import-defer
+title: "@babel/plugin-proposal-import-defer"
+sidebar_label: import-defer
+---
+
+Transforms `import defer` declarations to deferred `require()` calls.
+
+:::caution
+This plugin can only be used when also compiling modules to CommonJS.
+:::
+
+## Example
+```js title="input.js"
+import defer * as lib from "lib";
+
+later(() => {
+  console.log(lib.value);
+});
+```
+
+will be transformed to
+
+```js title="output.js"
+"use strict";
+
+function lib(data) {
+  lib = () => data;
+  return data = _interopRequireWildcard(require("lib"));
+}
+
+later(() => {
+  console.log(lib().value);
+});
+```
+
+## Installation
+
+```shell npm2yarn
+npm install --save-dev @babel/plugin-proposal-import-defer
+```
+
+## Usage
+
+### With a configuration file (Recommended)
+
+```json title="babel.config.json"
+{
+  "plugins": [
+    "@babel/plugin-proposal-import-defer",
+    "@babel/plugin-transform-modules-commonjs"
+  ]
+}
+```
+
+### Via CLI
+
+```sh title="Shell"
+babel --plugins=@babel/plugin-proposal-import-defer,@babel/plugin-transform-modules-commonjs script.js
+```
+
+### Via Node API
+
+```js title="JavaScript"
+require("@babel/core").transformSync("code", {
+  plugins: [
+    "@babel/plugin-proposal-import-defer",
+    "@babel/plugin-transform-modules-commonjs"
+  ],
+});
+```
+
+## References
+
+- [Proposal: Deferred Import Evaluation](https://github.com/tc39/proposal-defer-import-eval/)

docs/plugin-proposal-import-source.md

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+---
+id: babel-plugin-proposal-import-wasm-source
+title: "@babel/plugin-proposal-import-wasm-source"
+sidebar_label: import-wasm-source
+---
+
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+Transforms `import source` declarations to `WebAssembly.Module` objects, assuming that `import source` is being used to import the source of a WebAssembly Module.
+
+The transformation applied by this plugin depends on your top-level [`targets`](https://babeljs.io/docs/options#targets) to detect whether the generated code should be compatible with Node.js, browsers, or both. When targeting Node.js, the generated code will also change depending on whether you are compiling modules to CommonJS or not.
+
+:::caution
+This plugin cannot be used when compiling modules to AMD, SystemJS, or UMD.
+:::
+
+## Example
+```js title="input.js"
+import source libMod from "./lib.wasm";
+```
+
+will be transformed to
+
+<Tabs>
+  <TabItem value="browsers" label="Browsers" default>
+
+  ```js title="output.js"
+  const libMod = await WebAssembly.compileStreaming(fetch(import.meta.resolve("./lib.wasm")));
+  ```
+  </TabItem>
+  <TabItem value="node-esm" label="Node.js (ESM)">
+
+  ```js title="output.js"
+  import { readFileSync as _readFileSync } from "fs";
+  const libMod = new WebAssembly.Module(_readFileSync(new URL(import.meta.resolve("./lib.wasm"))));
+  ```
+  </TabItem>
+  <TabItem value="node-cjs" label="Node.js (CommonJS)">
+
+  ```js title="output.js"
+  "use strict";
+
+  const libMod = new WebAssembly.Module(require("fs").readFileSync(require.resolve("./lib.wasm")));
+  ```
+  </TabItem>
+</Tabs>
+
+## Installation
+
+```shell npm2yarn
+npm install --save-dev @babel/plugin-proposal-import-wasm-source
+```
+
+## Usage
+
+### With a configuration file (Recommended)
+
+```json title="babel.config.json"
+{
+  "plugins": [
+    "@babel/plugin-proposal-import-wasm-source"
+  ]
+}
+```
+
+### Via CLI
+
+```sh title="Shell"
+babel --plugins=@babel/plugin-proposal-import-wasm-source script.js
+```
+
+### Via Node API
+
+```js title="JavaScript"
+require("@babel/core").transformSync("code", {
+  plugins: [
+    "@babel/plugin-proposal-import-wasm-source"
+  ],
+});
+```
+
+## References
+
+- [Proposal: Source Phase Imports](https://github.com/tc39/proposal-source-phase-imports/)

docs/plugin-proposal-optional-chaining-assign.md

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+---
+id: babel-plugin-proposal-optional-chaining-assign
+title: "@babel/plugin-proposal-optional-chaining-assign"
+sidebar_label: optional-chaining
+---
+
+Transform optional chaining on the left-hand side of assignment expressions.
+
+## Example
+```js title="input.js"
+function doSomething(maybeOptions) {
+  maybeOptions?.retries = 5;
+}
+```
+
+will be transformed to
+
+```js title="output.js"
+function doSomething(maybeOptions) {
+  maybeOptions !== null && maybeOptions !== void 0 && maybeOptions.retries = 5;
+}
+```
+
+## Installation
+
+```shell npm2yarn
+npm install --save-dev @babel/plugin-proposal-optional-chaining-assign
+```
+
+## Usage
+
+### With a configuration file (Recommended)
+
+```json title="babel.config.json"
+{
+  "plugins": ["@babel/plugin-proposal-optional-chaining-assign"]
+}
+```
+
+### Via CLI
+
+```sh title="Shell"
+babel --plugins @babel/plugin-proposal-optional-chaining-assign script.js
+```
+
+### Via Node API
+
+```js title="JavaScript"
+require("@babel/core").transformSync("code", {
+  plugins: ["@babel/plugin-proposal-optional-chaining-assign"],
+});
+```
+
+## Options
+
+### Assumptions
+
+This plugin is affected by the [`noDocumentAll`](https://babeljs.io/docs/assumptions#nodocumentall) assumption.
+
+## References
+
+- [Proposal: Optional Chaining Assignment](https://github.com/tc39/proposal-optional-chaining-assignment)

docs/plugin-syntax-import-defer.md

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+---
+id: babel-plugin-syntax-import-defer
+title: "@babel/plugin-syntax-import-defer"
+sidebar_label: syntax-import-defer
+---
+
+:::note
+#### Syntax only
+
+It's unlikely you want to use this plugin directly as it only enables Babel to parse this syntax. Instead, use [plugin-proposal-import-defer](plugin-proposal-import-defer.md) to _both_ parse and transform this syntax.
+:::
+
+This plugin enables parsing for `import defer` declarations.
+
+## Installation
+
+```shell npm2yarn
+npm install --save-dev @babel/plugin-syntax-import-defer
+```
+
+## Usage
+
+### With a configuration file (Recommended)
+
+```json title="babel.config.json"
+{
+  "plugins": ["@babel/plugin-syntax-import-defer"]
+}
+```
+
+### Via CLI
+
+```sh title="Shell"
+babel --plugins @babel/plugin-syntax-import-defer script.js
+```
+
+### Via Node API
+
+```js title="JavaScript"
+require("@babel/core").transformSync("code", {
+  plugins: ["@babel/plugin-syntax-import-defer"]
+});
+```
+

docs/plugin-syntax-import-source.md

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+---
+id: babel-plugin-syntax-import-source
+title: "@babel/plugin-syntax-import-source"
+sidebar_label: syntax-import-source
+---
+
+:::note
+#### Syntax only
+
+It's unlikely you want to use this plugin directly as it only enables Babel to parse this syntax. Instead, use [plugin-proposal-import-source](plugin-proposal-import-source.md) to _both_ parse and transform this syntax.
+:::
+
+This plugin enables parsing for `import source` declarations.
+
+## Installation
+
+```shell npm2yarn
+npm install --save-dev @babel/plugin-syntax-import-source
+```
+
+## Usage
+
+### With a configuration file (Recommended)
+
+```json title="babel.config.json"
+{
+  "plugins": ["@babel/plugin-syntax-import-source"]
+}
+```
+
+### Via CLI
+
+```sh title="Shell"
+babel --plugins @babel/plugin-syntax-import-source script.js
+```
+
+### Via Node API
+
+```js title="JavaScript"
+require("@babel/core").transformSync("code", {
+  plugins: ["@babel/plugin-syntax-import-source"]
+});
+```
+

docs/plugin-syntax-optional-chaining-assign.md

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+---
+id: babel-plugin-syntax-optional-chaining-assign
+title: "@babel/plugin-syntax-optional-chaining-assign"
+sidebar_label: syntax-optional-chaining-assign
+---
+
+:::note
+#### Syntax only
+
+It's unlikely you want to use this plugin directly as it only enables Babel to parse this syntax. Instead, use [plugin-proposal-optional-chaining-assign](plugin-proposal-optional-chaining-assign.md) to _both_ parse and transform this syntax.
+:::
+
+This plugin enables parsing for `obj?.prop = val;` assignments.
+
+## Installation
+
+```shell npm2yarn
+npm install --save-dev @babel/plugin-syntax-optional-chaining-assign
+```
+
+## Usage
+
+### With a configuration file (Recommended)
+
+```json title="babel.config.json"
+{
+  "plugins": ["@babel/plugin-syntax-optional-chaining-assign"]
+}
+```
+
+### Via CLI
+
+```sh title="Shell"
+babel --plugins @babel/plugin-syntax-optional-chaining-assign script.js
+```
+
+### Via Node API
+
+```js title="JavaScript"
+require("@babel/core").transformSync("code", {
+  plugins: ["@babel/plugin-syntax-optional-chaining-assign"]
+});
+```
+