Adds `kvm` to NodeType, with a label, a MonitorCog icon, a per-theme
accent and a registered node component, plus the Hardware group of the
node and custom-style pickers and the MCP NODE_TYPES list.
Scanner autodetect: port-agnostic signatures for PiKVM, TinyPilot,
JetKVM and NanoKVM, matched on the HTTP probe's title/headers, and `kvm`
placed ahead of `server` in the suggest_node_type priority list.
suggest_node_type called match_port, which drops the HTTP-probe signals,
so no `port: null` signature could influence a suggested type — Unraid,
OpenMediaVault and Cockpit included. It now calls match_service with the
probe signals, which is what makes the KVM signatures reachable.
Closes#314
ha-relevant: yes
Pouzor
5040b70073