Add build script to react-native-babel-preset

[dmytrorykun]

Summary: When metro-react-native-babel-preset was part of Metro, Metro would take care of building flow-typed src before publishing. React Native doesn't do that.

This diff adds build script, prepare and postpublish hooks to react-native-babel-preset. The script is effectively is a copy-paste from react-native-codegen, we'll deduplicate them in the future.

Changelog: [Internal] - Add build script to react-native-babel-preset

Differential Revision: D47006597

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D47006597

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D47006597

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	9,001,457	-5
android	hermes	armeabi-v7a	8,255,371	-4
android	hermes	x86	9,510,503	-3
android	hermes	x86_64	9,356,367	-2
android	jsc	arm64-v8a	9,614,528	-1
android	jsc	armeabi-v7a	8,741,023	-4
android	jsc	x86	9,701,380	-4
android	jsc	x86_64	9,947,942	-1

Base commit: 0519c11acd0c347db378bbc9238c7dabfd38f6fa Branch: main

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D47006597

[github-actions[bot]]

	Warnings
:warning:	:lock: package.json - Changes were made to package.json. This will require a manual import by a Facebook employee.

Generated by :no_entry_sign: dangerJS against 37e7a23f98680cace4c564f57bae37674bf0583d

[cortinico]

Closing as abandoned internally