Namespace Support

**Is your feature request related to a problem? Please describe.**
- Teams A should be allowed to manage & access App A ONLY, not App B, App C neither
- Teams B should be allowed to manage & access App B ONLY, not App A, App C neither
- Teams C should be allowed to manage & access App C ONLY, not App A, App B neither

**Describe the solution you'd like**
This is the purpose of Namespaces in K8S.

**Describe alternatives you've considered**
The only other option would be to create a new ASA instance.

**Additional context**
see [https://github.com/Azure/Azure-Spring-Apps/issues/20](https://github.com/Azure/Azure-Spring-Apps/issues/20)

Start by reading the Namespace Support request and the linked Azure/Azure-Spring-Apps issue #20, then review how Kubernetes namespaces provide team-level isolation. No files, tests, or entry points are identified; done would require an agreed design and implementation that limits each team's access to its own applications without requiring separate ASA instances.

索引モデルが issue の本文から書いたものです。