Refactor GeecsDevice for clarity and improved event handling

Reorganized and refactored the GeecsDevice class to improve code clarity, type annotations, and logging. Added and documented event handler registration for TCP update events, improved error handling and logging, and clarified method responsibilities. Updated scan file and INI file handling, and improved synchronization and thread management logic. No functional changes to device control logic, but code is now more maintainable and robust.

Author: skbarber