Enforce Subscription Project Limits

**Description:** Prevent project creation above subscription limits
**Scenario:** Prevent project creation above subscription limit
Given I have an organization on the Starter plan
And the organization already has 1 project
When I try to create another project
Then I should see a subscription limit warning
And the project should not be created

No file or test is named. Start by locating the project-creation flow in the admin client and checking how the organization’s subscription plan and project count are available; then trace any existing limit or warning handling. Done means a Starter organization with one project sees a subscription-limit warning and the second project is not created.

Written by the indexing model from the issue text.