LAN printer support (status + print)

[pzfreo]

Summary

Add LAN (direct connection) printer support to bambox for status queries and printing without cloud dependency. Tracked separately from cloud support (#89, #90).

Scope

• bambox login gains LAN printer setup option (IP, access code, serial)
• bambox status gains LAN printer status queries
• bambox print gains LAN print path
• Credential format: type = "bambu-lan" with ip, access_code, serial fields

Open questions

• Use Python bambulabs-api library or implement MQTT directly?
• Or wait for Rust bridge to support LAN mode (Build and deployment: Dockerfile, WebSocket, LAN mode #29)?

Depends on

• bambox login: cloud authentication and credential management #89 (bambox login) — credential infrastructure
• bambox status: printer status CLI #90 (bambox status) — status rendering