sockets: per-TCP-connection listing via netcfg
netcfg/sockets/list now enumerates each active TCP socket with:
- State (Established, Listen, SynSent, etc.)
- Local endpoint (e.g., 127.0.0.1:8080)
- Remote endpoint (e.g., 192.168.1.5:51234) or '-' if not connected
Per-protocol counts still shown:
sockets: N (tcp=N udp=N icmp=N raw=N)
tcp: Established 127.0.0.1:22 -> 10.0.0.5:54321
tcp: Listen 0.0.0.0:80 -> -
tcp: SynSent 192.168.1.1:1025 -> 8.8.8.8:53
...
Mirrors Linux 'ss -t' output format.
Uses smoltcp Socket enum pattern matching (was previously blocked
because Socket didn't expose type-check methods).
Red Bear OS
0725f81144