chore: Ts more explicit modules

[snowystinger]

Closes

Form stories is a 1:1 comparison to convert to CSF. All S2 icons/illustrations now have a return type of ReactNode, this should be correct for newer versions of React and is what we currently return https://app.unpkg.com/@react-spectrum/[email protected]/files/icons/3D.d.ts

All v3 icons now return JSX.Element, same as implicit https://app.unpkg.com/@spectrum-icons/[email protected]/files/123.d.ts

Made some files in dev/test-utils typescript so that i could explicitly type the source as opposed to casting where it was being used

To test, you can edit tsconfig. Note, there are still errors in the repo, this is a subset of the changes

-     "allowJs": true,
+     "allowJs": false,
+    "declaration": true,
+    "isolatedDeclarations": true,

✅ 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:

[rspbot]

Build successful! 🎉

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[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the documentation

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the documentation

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the documentation