[types] fix package.json types path, patch types

[henryqdineen]

What changed / motivation ?

I realized I made a silly typo in #1351 ("dist" vs "lib" in the package.json#types field) and this PR fixes it.

As part of this I added TypeScript tests for @stylexjs/babel-plugin and fixed an issue that were running into with v0.17.2 since we do not use skipLipCheck: true. The flow-api-translator tool was generating invalid TypeScript in @stylexjs/babel-plugin/lib/shared/types/index.d.ts which resulted in an error:

Type alias name cannot be 'number'.(2457)`

This appears to be a regression with the upgrade of flow-api-translator in #1336. My fix is to just copy the index.d.ts file with a small edit:

@@ -187,7 +187,6 @@
 export declare const number: <T extends NumberValue = NumberValue>(
   value: NestedWithNumbers,
 ) => Num<T>;
-export declare type number = typeof number;
 type ResolutionValue = string | 0;
 export declare class Resolution<T extends ResolutionValue>
   extends BaseCSSType

Sorry for the typo. Thanks again!

Pre-flight checklist

• I have read the contributing guidelines
  Contribution Guidelines
• Performed a self-review of my code

[mellyeliu]

Thanks for fixing this!