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>

custom_components/remote_media_player/manifest.json

@@ -0,0 +1,12 @@
+{
+  "domain": "remote_media_player",
+  "name": "Remote Media Player",
+  "codeowners": [],
+  "config_flow": true,
+  "dependencies": [],
+  "documentation": "https://github.com/YOUR_USERNAME/haos-remote-media-player",
+  "integration_type": "device",
+  "iot_class": "local_push",
+  "requirements": ["aiohttp>=3.8.0"],
+  "version": "1.0.0"
+}