Add minimum necessary .d.ts files to react-native-codegen (2)

[ZihanChen-MSFT]

Summary

• Add .d.ts files for generators
• export each generators because react-native-windows need its own selection of generators.

Changelog

[GENERAL] [CHANGED] - Add minimum necessary .d.ts files to react-native-codegen (2)

Test Plan

npm run build in packages/react-native-codegen and see all .d.ts files appear in lib. Checked .d.ts file in typescript playground.

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	8,517,351	+0
android	hermes	armeabi-v7a	7,833,003	+0
android	hermes	x86	8,997,779	+0
android	hermes	x86_64	8,852,982	+0
android	jsc	arm64-v8a	9,141,144	+0
android	jsc	armeabi-v7a	8,332,635	+0
android	jsc	x86	9,195,987	+0
android	jsc	x86_64	9,454,035	+0

Base commit: 48c7adc3bf574c6d592e9d1c1c4bd266f88063f7 Branch: main

[facebook-github-bot]

@cipolleschi has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[cipolleschi]

/rebase

[cipolleschi]

I think these errors must be addressed:

/home/circleci/react-native/packages/react-native-codegen/src/generators/RNCodegen.d.ts
   8:33  warning  Strings must use singlequote                                       quotes
  74:5   error    Property is optional, so `undefined` must be included in the type  redundant-undefined/redundant-undefined
  80:5   error    Property is optional, so `undefined` must be included in the type  redundant-undefined/redundant-undefined
  90:5   error    Property is optional, so `undefined` must be included in the type  redundant-undefined/redundant-undefined

[facebook-github-bot]

@cipolleschi has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@cipolleschi merged this pull request in facebook/react-native@ac5aec3f5caa732f4565328447ffa9da7ede8dec.