Refactor MedTrackerApp and UI components for improved structure and readability

- Simplified initialization logic in init.py
- Consolidated testing_mode assignment
- Removed unnecessary else statements
- Created UIManager class to handle UI-related tasks
- Modularized input frame creation, table frame creation, and graph frame creation
- Enhanced edit window creation with better organization and error handling
- Updated data management methods to improve clarity and maintainability
- Improved logging for better debugging and tracking of application flow

.gitignore

@@ -7,3 +7,4 @@ __pycache__/
 *.spec
 *.log
 logs/
+.vscode/