Initial commit: Media server and Home Assistant integration

- FastAPI server for Windows media control via WinRT/SMTC
- Home Assistant custom integration with media player entity
- Script button entities for system commands
- Position tracking with grace period for track skip handling
- Server availability detection in HA entity

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

CLAUDE.md

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+# Media Server for Home Assistant
+
+## Project Overview
+
+A server-client system to control PC media playback from Home Assistant.
+
+- **Server**: FastAPI REST API on Windows controlling system-wide media via WinRT
+- **Client**: Home Assistant custom integration exposing a media player entity
+
+## Running the Server
+
+### Manual Start
+
+```bash
+cd c:\Users\Alexei\Documents\haos-integration-media-player
+python -m media_server.main
+```
+
+### Auto-Start on Boot (Windows Task Scheduler)
+
+Run in **Administrator PowerShell** from the project root:
+
+```powershell
+.\media_server\service\install_task_windows.ps1
+```
+
+To remove the scheduled task:
+
+```powershell
+Unregister-ScheduledTask -TaskName "MediaServer" -Confirm:$false
+```
+
+## Home Assistant Integration
+
+Copy `custom_components/remote_media_player/` to your Home Assistant config folder.
+
+Integration files location: `U:\custom_components\remote_media_player`
+
+## API Token
+
+The API token is generated on first run and displayed in the console output.
+Configure the same token in Home Assistant integration settings.
+
+## Server Port
+
+Default: `8765`
+
+## Git Rules
+
+Always ask for user approval before committing changes to git.