feat: experimental lazy-compilation support

[jbroma]

Summary

Enable experimental lazy compilation support. This is done via react-native-event-source package which serves as a polyfill for EventSource which is not present in react-native environment.

Checklist

• - enable lazy compilation in DevelopmentPlugin
• - add DX errors related to lazy compilation
• - add a guide to docs about lazy compilation

Test plan

• tested locally on TesterApp

[changeset-bot]

🦋 Changeset detected

Latest commit: ea76674

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

This PR includes changesets to release 2 packages

Name	Type
@callstack/repack	Minor
testerapp	Patch

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[jbroma]

Docs preview: https://653f98faa8057505cc80046a--re-pack.netlify.app/docs/configuration/guides/lazy-compilation

[thymikee]

The docs look good. Maybe one more thing that I would expect as a user would be code example – what code patterns do I need to use to benefit from lazy compilation. So something like:

You may find this useful if you have a lot of code like this:

const Component = React.lazy(() => await import('./component'));
return (
  <Supense>
    <Component />
  </Supense>
);