Extract the content of the case 'StringTypeAnnotation' into a single …

[ken0nek]

Summary

This PR extracts the content of the codegen case 'String' into a single emitString function inside the parsers-primitives.js file and uses it in both Flow and TypeScript parsers as requested on #34872. This also adds unit tests to the new emitString function.

ref: #34936

Changelog

[Internal] [Changed] - Extract the content of the case 'StringTypeAnnotation' into a single emitString function

Test Plan

Run yarn jest react-native-codegen and ensure CI is green

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,777,431	+0
android	hermes	armeabi-v7a	7,178,422	+0
android	hermes	x86	8,090,425	+0
android	hermes	x86_64	8,062,120	+0
android	jsc	arm64-v8a	9,636,881	+0
android	jsc	armeabi-v7a	8,401,168	+0
android	jsc	x86	9,586,058	+0
android	jsc	x86_64	10,179,226	+0

Base commit: a575472
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: 8422557
Branch: main

[cipolleschi]

Amazing, thank you so much for doing this! 👏

[facebook-github-bot]

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

[react-native-bot]

This pull request was successfully merged by @ken0nek in eda90e5.

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