## Summary
- Adds an Enable/Disable dropdown action in each row of the custom OAuth
providers list.
- Disabling opens a confirmation modal that calls the existing update
API with `enabled: false`; enabling is immediate (restorative, no
confirmation).
- Removes the hardcoded `enabled: true` from the edit sheet's update
payload so editing a disabled provider no longer silently re-enables it.
Closes
[FE-3067](https://linear.app/supabase/issue/FE-3067/add-disable-button-for-custom-oauth-providers).
## Test plan
- [x] Create a custom OAuth provider — it is enabled by default.
- [x] Click the row menu → "Disable". Confirm in the modal. Row shows
`Disabled` badge.
- [x] Click the row menu → "Enable". Row immediately flips back to
`Enabled`.
- [x] Edit a disabled provider via the "Update" action, save. Verify it
remains `Disabled` (no silent re-enable).
- [x] Delete action still works.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## Release Notes
* **New Features**
* Added enable/disable toggle controls for individual custom OAuth
providers in the provider list
* Added confirmation dialog when disabling a provider to prevent
accidental changes
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
