Add support for the new architecture

[j-piasecki]

PR adding New Architecture support to the library 🎉

We at Software Mansion have been working on improving support for the new architecture for quite a while now. If you need help with anything related to New Architecture, like:

• migrating your library
• migrating your app
• investigating issues
• improving performance

or you just want to ask any questions, hit us up on projects@swmansion.com

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This PR:

• adds a new FabricExample app with the new arch enabled by default
• converts the library to a TurboModule
• due to some codegen quirks (getConstants() must be returning object literal on iOS and type safety is enforced on Android), I've moved constants exported by the native module into constants object, i.e. instead of returning { constant1: 'value1', constant2: 'value2' } the native side now returns { constants: { constant1: 'value1', constant2: 'value2' } }

The changes in this PR apply to iOS and Android codebase, I've tried to make sure that Windows is unaffected but I cannot test it.

[yidafu]

Is there any progress?

[j-piasecki]

@luancurti Are there any plans to review this PR? If so, I can merge the main branch and update the app to 0.73.

[denissb]

I don't think this project is actively maintained anymore since last release was more than a year ago, maybe it makes sense to publish/maintain a fork supporting RN >=0.72 ?