Update dependencies and restructure project files

- Added mutagen, requests, and yt-dlp as dependencies in pyproject.toml and requirements.txt.
- Removed run_generator.py, start_server.py, and test_generator.py as they are no longer needed.
- Introduced setup.sh for initial setup instructions and directory creation.
- Updated uv.lock with new package versions and dependencies.

setup.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# SERMAN RSS Feed Generator - Setup Script
+
+echo "🎵 SERMAN RSS Feed Generator - Setup"
+echo "==================================="
+echo ""
+
+# Prüfe ob audio-Verzeichnis existiert
+if [ ! -d "_audio" ]; then
+    echo "📁 Erstelle _audio/ Verzeichnis..."
+    mkdir _audio
+fi
+
+echo "📋 Setup abgeschlossen!"
+echo ""
+echo "Nächste Schritte:"
+echo "1. Lege deine MP3-Dateien in das _audio/ Verzeichnis"
+echo "2. Führe 'uv run python main.py' aus, um den RSS-Feed zu erstellen"
+echo "3. Verwende 'uv run python main.py --serve' für lokales Testen"
+echo ""
+echo "💡 Beispiel-Befehle:"
+echo "   uv run python main.py                          # Feed erstellen"
+echo "   uv run python main.py --serve                  # Mit HTTP-Server"
+echo "   uv run python main.py --base-url https://...   # Produktions-URL"
+echo ""