fix: make codegenNativeComponent's return type nameable by consumers

[artus9033]

Summary:

codegenNativeComponent() declared its return type as NativeComponentType<Props>. That alias lives in Libraries/Utilities/codegenNativeComponent.js and is not re-exported from the react-native root, and the package's exports map has no ./types_generated/* subpath, so the deep specifier is not resolvable either.

As a result, any library that calls codegenNativeComponent() and emits declaration files fails to build under moduleResolution: node16/nodenext/bundler - TypeScript cannot name the inferred return type portably:

src/ReactNativeTestViewNativeComponent.ts:11:1 - error TS2883: The inferred type of 'default' cannot be named without a reference to 'NativeComponentType' from '../node_modules/react-native/types_generated/Libraries/Utilities/codegenNativeComponent'. This is likely not portable. A type annotation is necessary.
  
  11 export default codegenNativeComponent<NativeProps>('ReactNativeTestView');
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is the default fabric-view template from create-react-native-library, so every new Fabric view library hits it.
It used to work before RN 0.87.0, until #57490 has removed visibility of the internally exported types.

Example of breakage - this test run in react-native-builder-bob: https://github.com/callstack/react-native-builder-bob/actions/runs/32675382955/job/97282442650#step:19:20

Fix

The fix is to declare the return type as HostComponent<Props> instead. NativeComponentType<T> is defined as HostComponent<T>, but only HostComponent is exported from root. Consumers can reach it via import('react-native').HostComponent<Props>.

Changelog:

[GENERAL] [FIXED] - Fix TS2883 when building declaration files for libraries that use codegenNativeComponent due to unreachable NativeComponentType<T>

Test Plan:

Tested locally on a library generated with Bob.

[github-actions]

Warning

JavaScript API change detected

This PR commits an update to ReactNativeApi.d.ts, indicating a change to React Native's public JavaScript API.

• Please include a clear changelog message.
• This change will be subject to additional review.

This change was flagged as: POTENTIALLY_BREAKING

[artus9033]

CC @huntie

[huntie]

Endorsed. Thanks 🙏🏻