Add desktop GUI application with system tray support

- Created PySide6-based desktop application
- Added system tray integration for Windows and Linux
- Built-in log viewer and configuration wizard
- Easy setup and automatic playlist updates
- Cross-platform compatibility
- Updated README with comprehensive instructions

run_app.bat

@@ -0,0 +1,14 @@
+@echo off
+REM Journey FM Playlist Creator - Windows Launcher
+
+cd /d "%~dp0"
+
+REM Activate virtual environment if it exists
+if exist .venv\Scripts\activate.bat (
+    call .venv\Scripts\activate.bat
+)
+
+REM Run the application
+python journey_fm_app.py
+
+pause