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>

CLAUDE.md

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+# HAOS Integration - Development Guide
+
+## Overview
+
+HACS-ready Home Assistant custom integration for controlling remote PC media playback.
+
+## Installation
+
+Copy `custom_components/remote_media_player/` to your Home Assistant config folder.
+
+Or install via HACS as a custom repository.
+
+## Requirements
+
+Requires Media Server running on the target PC.
+
+Media Server Repository: `TODO: Add repository URL`
+
+## Integration Location
+
+Integration files location: `U:\custom_components\remote_media_player`
+
+## Git Rules
+
+Always ask for user approval before committing changes to git.