Upgrade project to Python 3.11.5 and refactor imports and added setup.sh

[mcpe500]

• Refactored import statements to use relative paths for better modularity.
• Updated .gitignore to include additional files and directories:
  • Byte-compiled / optimized / DLL files
  • .idea/ and migrations/
  • C extensions (*.so)
  • Distribution / packaging files (.Python, env/, .env, build/, develop-eggs/, dist/, downloads/, eggs/, .eggs/, lib/, lib64/, parts/, sdist/, var/, *.egg-info/, .installed.cfg, *.egg)
  • PyInstaller files (*.manifest, *.spec)
  • Installer logs (pip-log.txt)
• Modified DB_Wrappers/WaitingList.py for compatibility with Python 3.11.5.
• Updated analytics.py, app.py, config.py, and manage.py for Python 3.11.5.
• Refactored modules (debug.py, endChat.py, gamification.py, image.py, quick_replies.py, startChat.py, utilities.py) to support Python 3.11.5.
• Updated requirements.in and requirements.txt to include necessary dependencies for Python 3.11.5.
• Added setup.sh for project setup and initialization.
• Added .env.example for environment variable management.
• Updated manage.py to use Flask's built-in CLI commands for running the server.