Initial commit: HACS-ready Home Assistant integration

Remote Media Player integration for controlling PC media playback
from Home Assistant via the Media Server API.

Features:
- Full media player controls (play, pause, stop, next, previous)
- Volume control and mute
- Seek support with smooth timeline updates
- Real-time updates via WebSocket
- Script buttons for PC control (shutdown, restart, lock, etc.)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

hacs.json

@@ -0,0 +1,5 @@
+{
+  "name": "Remote Media Player",
+  "render_readme": true,
+  "homeassistant": "2024.1.0"
+}