Initial commit: Telegram monitoring bot with external configuration

- Externalize configuration to YAML (config_example.yaml)
- Add config loader with validation in bot.py
- Implement DatabaseManager for activity logging and user stats
- Add message handlers with topic awareness
- Include setup_venv.sh for automated environment setup
- Add requirements.txt with dependencies (python-telegram-bot, PyYAML)
- Comprehensive README with setup and configuration instructions

config_example.yaml

@@ -0,0 +1,20 @@
+# LoggingBot Konfiguration
+# Kopiere diese Datei zu 'config.yaml' und passe die Werte an
+
+bot:
+  # Telegram Bot Token (von BotFather erhalten)
+  token: "YOUR_BOT_TOKEN_HERE"
+  # Debug-Ausgaben aktivieren/deaktivieren
+  debug_mode: true
+
+database:
+  # Name der SQLite-Datenbank
+  name: "group_monitor.db"
+
+logging:
+  # Aktiviere Datei-Logging (activity_log.txt)
+  write_to_file: true
+  # Dateiname für Aktivitätsprotokolle
+  file_name: "activity_log.txt"
+  # Python Logging Level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
+  level: "INFO"