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>

.gitignore

@@ -0,0 +1,48 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Virtual environments
+venv/
+ENV/
+env/
+.venv/
+
+# IDE
+.idea/
+.vscode/
+.claude/
+*.swp
+*.swo
+*~
+
+# Config files with secrets
+config.yaml
+config.json
+.env
+
+# Logs
+*.log
+logs/
+
+# OS
+.DS_Store
+Thumbs.db