chore: add clean and clean:all script

[unional]

One improvements on #9426

Adding yarn clean and yarn clean:all to make the script make clean and make clean_all more easily discovered and use.

Another way is to update the CONTRIBUTION.md to point out or list the make commands from the Makefile.

✅ 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:

Run yarn clean and yarn clean:all

🧢 Your Project:

[snowystinger]

At first I thought maybe we shouldn't have script targets that called make since that won't work on some machines, but it looks like build does it, so I think it's fine.

Thanks!

[unional]

In general, it would be better to migrate from using Makefile to pure JS/TS solution, as make does not exist in Windows environment. That would allow people using Windows to contribute.

Of course, that's a much bigger undertaking and wouldn't benefit your team much if you are developing solely in Linux or MacOS.