## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.
YES
## What kind of change does this PR introduce?
Adds feature flag for controlling region unavailability.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Region options now display availability badges, tooltips, and
status-specific notices.
* Restricted regions remain selectable so users can review their
availability status.
* Project creation provides a clear field-level message when a selected
region is unavailable and prompts users to choose another region.
* **Bug Fixes**
* Region availability messaging now consistently reflects platform
status and configured restrictions.
* Availability warnings clear after selecting an eligible region.
* Region checks now cover both dynamic and static provider regions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
