Add enableBabelRuntime option to reduce a bundle size

[retyui]

Summary:

I described the issue here: https://x.com/tell_me_mur/status/2064328541861183526?s=20

shorty without babel runtime version specified, babel helpers will be inlined multiple times across different files instead on imported once

Changelog:

[GENERAL] [ADDED] - Add enableBabelRuntime option to reduce a bundle size

Test Plan:

...

[cortinico]

cc @robhogan

[retyui]

@robhogan Do you think we can merge this change to the template ?

[robhogan]

I appreciate the direction here but I don’t want to be adding more to the template that doubles down on the assumption that source files have a known local version of @babel/runtime - that breaks down as soon as you put the template in a workspace and try to depend on code outside.

The way I’m looking to do this is to bypass hierarchical lookup for @babel/runtime by having plugin-transform-runtime instead inject metro:babel-runtime references, and then we can control where that resolves to - a dependency of the build toolchain rather than of the app. Runtime and version can be passed through the template in that case.

The wiring (scheme resolvers, moduleName via caller) is mostly shipped now and I’m aiming to get that into the next RN cut. The end result will be no template dependency on @babel/runtime at all, so less boilerplate for users to manage.