fix: nightly packing too many files

[snowystinger]

Closes

I found that yarn uses micromatch, https://github.com/yarnpkg/berry/blob/master/packages/plugin-pack/sources/packUtils.ts which will treat a pattern like !stories as literally just exclude the stories file, it doesn't match as a directory like npm or gitignore will.
We can test it here https://codesandbox.io/p/devbox/6wzks8

npm will however still work with the glob syntax, so doing it more explicitly as in this PR should work for both tools.

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

🧢 Your Project:

[devongovett]

Seems right. Not sure if we are going to have to publish src/exports for tsdiff. I was hoping not since it inflates the package size quite a bit. Maybe we can consider diffing based on a past git commit instead of npm?