Monolith HTP-1 integration

**Monolith HTP-1 integration**

Push-based Home Assistant integration for the Monoprice Monolith HTP-1, over the unit’s
WebSocket interface. No polling — it announces front-panel and web UI changes itself.

Auto-discovered on firmware 2.1.2+ via mDNS; enter the address manually on older
firmware. One device per processor, 20 entities: power, volume, mute, source, sound mode,
Dirac, night mode, loudness, bass, tone, dialogue enhancement, lip sync, and status
sensors.

One note: “turn off” is sleep, not shutdown (shutdown drops the network — separate button,
disabled by default).

Running on five units on firmware 2.1.2. HACS custom repository for now.

https://github.com/ajguerre1/ha-monolith-htp1