dillon1000/react

Create a bunch of custom webpack vs unbundled node bundles (#26172)

We currently have an awkward set up because the server can be used in
two ways. Either you can have the server code prebundled using Webpack
(what Next.js does in practice) or you can use an unbundled Node.js
server (what the reference implementation does).

The `/client` part of RSC is actually also available on the server when
it's used as a consumer for SSR. This should also be specialized
depending on if that server is Node or Edge and if it's bundled or
unbundled.

Currently we still assume Edge will always be bundled since we don't
have an interceptor for modules there.

I don't think we'll want to support this many combinations of setups for
every bundler but this might be ok for the reference implementation.

This PR doesn't actually change anything yet. It just updates the
plumbing and the entry points that are built and exposed. In follow ups
I'll fork the implementation and add more features.

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Co-authored-by: dan <[email protected]>