docs: fix search menu styles

[reidbarber]

Pulled changes from #9524 to get into this release:

• Add horizontal scrolling to search tags to avoid overflow (same as we already do for mobile)
• Start-align the info messages in Icons and Color search.
• Make the Icons and Color search layout styles consistent
• Trim icon/illustration search values

✅ 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:

1. On desktop, resize the window so that the search menu shrinks and verify that the search tags have horizontal scrolling
2. Verify that the Icons and Colors search info messages are both start-aligned instead of center-aligned.
3. Test Colors search on mobile, the listbox shouldn't have any horizontal scrolling.
4. Check that icons/illustrations search does not return an empty list when searching whitespace

🧢 Your Project:

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs

[yihuiliao]

Can we add align-items: center to the div?

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs