- Added assets including Minecraft icon and styles for the UI.
- Created a Code of Conduct to promote inclusivity and respect within the community.
- Implemented app configuration management with `app_config.py` and `config.py`.
- Developed instance management functionality in `instance_manager.py`.
- Introduced a downloader class for handling client downloads in `downloader.py`.
- Designed the main UI layout using Qt Designer in `form.ui`.
- Established the main application logic in `launcher.py`, including command-line argument handling.
- Added system management capabilities to detect the operating system in `system_manager.py`.
