* [heft] Revert `useNodeJSResolver: true`

* [rush] Revert `useNodeJSResolver: true`

* [rush] Add missing `./package.json` export

* [hashed-folder-copy] Add missing `./package.json` export

---------

Co-authored-by: David Michon <dmichon-msft@users.noreply.github.com>

* Introduce a Heft SWC plugin.

* Updates from testing repo.

* Refactor tsconfig loading.

* Remove an unused module.

* fixup! Refactor tsconfig loading.

* fixup! Introduce a Heft SWC plugin.

* fixup! Introduce a Heft SWC plugin.

* Introduce an accessor for tweaking the SWC options.

* Rename heft-isolated-transpile-plugin to heft-isolated-typescript-transpile-plugin.

* fixup! Rename heft-isolated-transpile-plugin to heft-isolated-typescript-transpile-plugin.

* Convert to using child_process.

* Add a 'numberOfCores' property to 'HeftConfiguration'

* fixup! Introduce a Heft SWC plugin.

* fixup! Add a 'numberOfCores' property to 'HeftConfiguration'

* Include missing package.json properties.

* Remove a ts-ignore

…ack/heft-isolated-typescript-transpile-plugin` (#5167)

* Fix a casing issue in the @rushstack/heft-isolated-typescript-transpile-plugin heft-plugin.json file.

* Fix an issue where the `rootPath` `tsconfig.json` property wasn't supported.

* Fix a crash when there are zero files to transpile.

* fixup! Fix an issue where the `rootPath` `tsconfig.json` property wasn't supported.

Co-authored-by: David Michon <dmichon@microsoft.com>

* Fix an issue with the paths in sourcemaps.

---------

Co-authored-by: David Michon <dmichon@microsoft.com>

Co-authored-by: David Michon <dmichon-msft@users.noreply.github.com>