Add browser build

[curran]

Closes #69

• usage in the browser #69

Heavily inspired by the great work already done by @cfraz89 in #239, this PR is a slightly more surgical approach, introducing the bare minimum changes to get a browser build to work.

I have tested it locally using npm link and it does work!

One drawback of this implementation is that it still exposes the reference to the global Buffer. This makes the code changes to this project minimal, but shifts the burden to consumers to perform some nasty hackery to get it to work, namely this:

import * as prettierPluginSvelte from 'prettier-plugin-svelte/browser';
import { Buffer } from 'buffer';
globalThis.Buffer = Buffer;

I propose to make the change that removes the Buffer dependency separately, treating that as a separate issue that would be an enhancement to the browser build.

• Remove dependency on Buffer #418

[dummdidumm]

Thanks for tackling this! Since import maps are standarized now, I think this is the right approach to externalize the modules and require people to use an import map or a bundler to fill the rest. Once the buffer PR is merged I'll look into this more closely.

[dummdidumm]

Note to self: check how big the .js.map of the browser build is, and if it's big, then decide if it's worth it to include it (I don't think so)

[curran]

Sure, could leave it out.

[curran]

Suggested change

"browser.js.map",

[curran]

Just want to give a heads up that I plan to publish this build as a separate package in NPM in the next week or so, so that I can use it in my app.

Please let me know if there are any blockers to merge that I can help with here. Thanks!

[dummdidumm]

I wanted to do a few edits but wasn't able to, therefore opened #430