chore: export CreatableTypeAheadDropdown and ColorPreview

[appletreeisyellow]

Changes

Export CreatableTypeAheadDropdown and ColorPreview in src/index.ts

Checklist

Check all that apply

• [x] Updated documentation to reflect changes
• [x] Added entry to top of Changelog with link to PR (not issue)
• [x] Tests pass
• [x] Peer reviewed and approved
• [x] Signed CLA (if not already signed)