Export TreeCollection and TableCollection

[jlongster-stripe]

Closes

✅ Pull Request Checklist:

This change shouldn't need any additional tests. We are building some utilities that want to access these collection classes. ListCollection is already exported (https://github.com/adobe/react-spectrum/blob/main/packages/%40react-stately/list/src/index.ts#L17) but these collection classes are not, so I'm assuming it'd be OK to export these.

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

📝 Test Instructions:

N/A

🧢 Your Project:

Stripe :)

[devongovett]

Seems reasonable, related to #3405. Curious what you're looking to do with them!

[snowystinger]

If you don't mind, follow the instructions here https://react-spectrum.adobe.com/contribute.html#contributor-license-agreement then close and reopen this PR, that will cause it to pass the last check so we can review this PR and consider merging it.

[reidbarber]

Fixed in #3690 so we can include this in the next release.

[jlongster-stripe]

Thanks a lot @reidbarber! I've been traveling so I didn't have time to re-open this.

@devongovett We are actually using our own collection APIs which have different tradeoffs. We aren't using the static JSX approach which turns it into data. Happy to talk more about it if you want!

[devongovett]

That's interesting. I have been working on a potential new approach as well.