Add custom image handling and access policy management

- Implement tests for custom KVM and LXC image creation, ensuring invalid sources and architecture mismatches are rejected.
- Introduce access policy management in CLI, allowing configuration of allowed sources and trusted proxies.
- Add NAT network configuration with validation for RFC1918 compliance and subnet parsing.
- Create panel access policy management, including normalization and evaluation of access decisions based on client IPs and forwarded headers.
- Develop middleware for enforcing access policies in the server, returning appropriate responses for allowed and denied requests.
- Enhance custom image downloading and validation, ensuring integrity and security of downloaded root filesystem archives.
- Include comprehensive tests for all new functionalities to ensure reliability and correctness.

frontend/src/pages/Containers.tsx

@@ -991,6 +991,7 @@ function getTemplateName(id: string) {
     'kvm-debian-bookworm': 'Debian 12',
     'kvm-debian-bullseye': 'Debian 11',
     'kvm-rockylinux-9': 'Rocky 9',
+    'kvm-windows-11': 'Windows 11',
     'kvm-windows-10': 'Windows 10',
   }
   return map[id] || id