implement robust error handling and fix infinite loop (Issue #51)

[imuday984]

This PR addresses several stability issues, including the infinite loop/crash reported in Issue #51, by modernizing the script's architecture and error-handling capabilities.

Key Changes:
Centralized Network Logic: Introduced a get_data() helper function. This ensures that all API calls are wrapped in try-except blocks to handle ConnectionError and Timeout gracefully without crashing the CLI.

Improved Loop Structure: Replaced recursive function calls in the main menu with a standard while True loop. This prevents potential RecursionError and improves memory efficiency.

Input Validation: Added a "catch-all" else block in the menu selection to handle invalid or empty user inputs safely.

Code Cleanliness: Utilized a decorator (@is_option) to handle UI boilerplate (clearing screen and showing banners), allowing the core logic functions to remain clean and focused.

Testing Done:
--> Tested IP Tracker with no internet connection (properly displays error instead of traceback).

-->Tested menu with invalid inputs like strings and empty spaces (re-prompts correctly).

--> Verified that the "Username Tracker" still functions with the new request helper.