Build: Exclude all test and story files from transpilation

[phated]

Issue: #11220

What I did

I split out the additional excludes from #11220 into a separate commit. One question that @shilman had was whether or not we could put these in the root config that the packages extend from instead of duplicating all the boilerplate.

How to test

• Is this testable with Jest or Chromatic screenshots? ❌
• Does this need a new example in the kitchen sink apps? ❌
• Does this need an update to the documentation? ❌

If your answer is yes to any of these, please make sure to include it in your PR.

[gaetanmaisse]

One question that @shilman had was whether or not we could put these in the root config that the packages extend from instead of duplicating all the boilerplate.

Yes definitely, I would suggest to set up a clean exclude property in the root tsconfig.json and then remove exclude in all sub tsconfig.

[phated]

@gaetanmaisse how does the exclude work in relation to the the working directory (if being used in extends)?

[phated]

@gaetanmaisse it looks like it is relative to the file you are importing, so we can't put them at the top level without using a very liberal glob (which would cause us to lose all the performance gains).

From https://www.typescriptlang.org/tsconfig#extends

All relative paths found in the configuration file will be resolved relative to the configuration file they originated in.

@shilman Given that limitation, are you okay merging this?

See #13714 (comment)