Implement react-server-dom-rspack

[SyMind]

Summary

This adds a new react-server-dom-rspack package, which is an RSC integration for the Parcel bundler. It is mostly copied from the existing webpack/turbopack integrations, with some changes to utilize Rspack runtime APIs for loading and executing bundles/modules.

Differences from react-server-dom-webpack
To better support Rspack's architecture and modern framework requirements, react-server-dom-rspack introduces several key enhancements:

• Native Manifest Integration: Added the __rspack_rsc_manifest__ compiler variable to provide manifest data directly to the RSC runtime.
• Runtime Global Callbacks: Introduced setServerCallback and setFindSourceMapURLCallback, enabling frameworks to configure global hooks in the browser environment.
• Inline Server Action Security: Added setServerActionBoundArgsEncryption, encryptServerActionBoundArgs, and decryptServerActionBoundArgs to handle encryption for closure-captured arguments in inline Server Actions.
• Framework Interop APIs:
  • loadServerAction: Exposes a standard way to load server actions.
  • createServerEntry: Provides access to CSS and JS entry point information for the upper-level framework.

This package is designed to work with Rspack v2.0+, which introduces built-in support for the RSC Plugin implementation in Rspack (introduced in web-infra-dev/rspack#12012)..

• Note: Rspack v2.0 is currently in beta. You can verify the release notes here.

I have verified the integration with a working example project:

• Example Repo: https://github.com/SyMind/rspack-rsc-examples

For testing purposes, I have published a pre-release version (0.0.x) of this package to npm. I am happy to grant access to maintainers if needed for verification.

Note: I've already published a 0.0.x version of this package to npm for testing purposes but happy to add whoever needs access to it as well.

How did you test this change?

[meta-cla]

Hi @SyMind!

Thank you for your pull request and welcome to our community.

Action Required

In order to merge any pull request (code, docs, etc.), we require contributors to sign our Contributor License Agreement, and we don't seem to have one on file for you.

Process

In order for us to review and merge your suggested changes, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

Once the CLA is signed, our tooling will perform checks and validations. Afterwards, the pull request will be tagged with CLA signed. The tagging process may take up to 1 hour after signing. Please give it that time before contacting us about it.

If you have received this in error or have any questions, please contact us at cla@meta.com. Thanks!

[meta-cla]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!

[SyMind]

@sebmarkbage hi, would you like to review this PR?