Add entitlement check for storage image transformations to properly
control access based on organization's plan.
### Changes
- Add `storage.image_transformations` entitlement check to Storage
Settings
- Add `storage.max_file_size.configurable` entitlement check to Storage
Settings
- Disable image transformation toggle based on entitlement instead of
just free tier check
- Wait for entitlement loading before initializing form values
- Use entitlement value as fallback when setting default
imageTransformationEnabled state
- Consolidate all loading states into a single isLoading variable for
cleaner code
### Testing
- Head to `/project/_/storage/files/settings` with an Org on the Free
Plan
- Assert that the Image Transformations toggle is disabled
- Head to `/project/_/storage/files/settings` with an Org on the Free
Plan
- Assert that the Image Transformations toggle is enabled
- Toggle it, save and refresh the page to assert that your changes were
correctly saved