Initial commit: Kivy Signage Player

- Complete Kivy-based signage player application
- Fetches playlists from DigiServer via REST API
- Supports images (JPG, PNG, GIF, BMP) and videos (MP4, AVI, MKV, MOV, WEBM)
- Modern UI with touch controls and settings popup
- Separated UI (KV file) from business logic (Python)
- Fullscreen media display with proper scaling
- Server feedback system for player status reporting
- Auto-hide controls with mouse/touch activation
- Virtual environment setup with requirements.txt
- Installation and run scripts included

Features:
✅ Cross-platform Kivy framework
✅ Server integration with DigiServer
✅ Media playback with duration control
✅ Player feedback and status reporting
✅ Settings management with persistent config
✅ Error handling and recovery
✅ Clean architecture with KV file separation

playlists/server_playlist_v5.json

@@ -0,0 +1,15 @@
+{
+  "playlist": [
+    {
+      "file_name": "call-of-duty-black-3840x2160-23674.jpg",
+      "url": "media/call-of-duty-black-3840x2160-23674.jpg",
+      "duration": 30
+    },
+    {
+      "file_name": "HARTING_Safety_day_informare_2_page_005.jpg",
+      "url": "media/HARTING_Safety_day_informare_2_page_005.jpg",
+      "duration": 20
+    }
+  ],
+  "version": 5
+}