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

journey_fm_app.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Journey FM Playlist Creator - Linux Startup Script
+
+# Get the directory where this script is located
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+
+# Activate virtual environment if it exists
+if [ -d "$DIR/.venv" ]; then
+    source "$DIR/.venv/bin/activate"
+fi
+
+# Run the application
+cd "$DIR"
+python journey_fm_app.py