Summary:

As a user of MPS, I want the ability to delete certificates that are not associated with any AMT profile or configuration, so I can remove unused certificates.

We already support Add and Get certificate APIs. This story adds Delete with safe-guards.

See this for reference src/routes/amt/certificates/](https://github.com/device-management-toolkit/mps/tree/main/src/routes/amt/certificates

Scope & Requirements:

• Allow deletion only when the certificate is unreferenced by any AMT profile/config.
• Block deletion when the certificate is referenced; return a clear, actionable error.
• Expose capability in API and Sample Web UI.

Acceptance Criteria:

• Add Delete Certificates API
• Sample Web UI Changes
• Update Postman Tests
• Testing - Confirm that unassociated certificates can be successfully deleted. and Ensure associated certificates cannot be deleted.
• Unit Tests
• API Tests
• Update docs