fix: decouple init & module error handling from runtime module

[jbroma]

Summary

partial solution to #866

In some cases loadScript runtime module might not get injected into the bundle. Since all of the logic for Repack runtime lives there, it might cause undefined behaviour like failing to process EarlyJS errors or failure to initialise Repack global object.

This PR separates the loadScript part into it's own runtime module, and makes init and moduleErrorHandler parts separate runtime modules.

Previously in Rspack there was no way to add runtime modules - we could only edit existing ones and we were forced to concatenate init & load script modules into one. This is no longer the case so we can split them into separate entities.

The types injected into the global scope were also reworked - now most types are hidden behind a RepackRuntimeGlobals namespace to prevent polluting the global typescript scope

Test plan

• - testers work

[changeset-bot]

🦋 Changeset detected

Latest commit: cc9dfbc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@callstack/repack	Patch
@callstack/repack-plugin-reanimated	Patch
@callstack/repack-dev-server	Patch
@callstack/repack-init	Patch

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[thymikee]

Looks like a solid improvement with less hacks. Any ideas how you could test it?

[jbroma]

Looks like a solid improvement with less hacks. Any ideas how you could test it?

I would just stick to existing integration tests that we have - this is a very internal change. The easiest way to test it in an additional way would be to compile a bundle and verify that the modules get injected properly.

[jbroma]

I needed to make the runtime module classes dynamic to deal with the compatibility between webpack and rspack, all works good now on both platforms 👍