feat: implement monorepo compatibility layer with library

[pmmmwh]

This PR implements a compatibility layer to allow multiple instances of React/React-Refresh to run simultaneously. Another layer of compatibility is added to the overlay to make sure only the first injection would happen (since it is global).

TODO: Documentation

Fixes #139
Fixes #239
Fixes #250

[frehner]

@pmmmwh in webpack5, webpack looks at either output.library, or package.json's name field, or output.uniqueName

Here's the docs on that https://webpack.js.org/configuration/output/#outputuniquename

Should we update this to accept those different fields?

[pmmmwh]

@pmmmwh in webpack5, webpack looks at either output.library, or package.json's name field, or output.uniqueName

Here's the docs on that https://webpack.js.org/configuration/output/#outputuniquename

Should we update this to accept those different fields?

I guess the simplest way out is to let Webpack do its thing, look at output.uniqueNameand if not found default to output.library?

[frehner]

@pmmmwh in webpack5, webpack looks at either output.library, or package.json's name field, or output.uniqueName
Here's the docs on that https://webpack.js.org/configuration/output/#outputuniquename
Should we update this to accept those different fields?

I guess the simplest way out is to let Webpack do its thing, look at output.uniqueNameand if not found default to output.library?

I haven't looked too closely at it to know for sure, but that may work.