Add PortForwardPage.tsx as standalone page for port forwarding management
with complete CRUD operations (Start, Stop, Delete). Includes real-time
status updates, auto-refresh, and integrated form for creating new forwards.
All 6 network resource list components already exist and are complete:
- ServiceList.tsx: Name, Type, Cluster IP, External IP, Ports, Age, Status
- IngressList.tsx: Name, Namespace, Load Balancers, Rules, Age
- NetworkPolicyList.tsx: Name, Namespace, Pod Selector, Age
- EndpointList.tsx: Name, Namespace, Endpoints, Age
- EndpointSliceList.tsx: Name, Namespace, Endpoints, Address Type, Age
- IngressClassList.tsx: Name, Controller, Age
Backend commands verified in kube.rs:
- start_port_forward, stop_port_forward, list_port_forwards, delete_port_forward
Navigation already integrated in KubernetesPage.tsx Network group.
