Added Test Cases | Issue #3

[SpreadSheets600]

The changes I made are as follows:

1. Testing Framework: Integrated pytest as the testing framework to ensure robust and maintainable testing for the project.
2. Initial Test Cases: Added unit tests for core modules, including:
   • auto_reload.py: Testing the AutoReloadManager class.
   • file_utils.py: Testing utility functions such as file_exists() and clear_terminal().
   • app_event_handler.py: Testing file event handling and callback triggers.
   • main.py: Testing the main logic for running and monitoring the Tkinter app.
3. Test Documentation: Updated the README to include instructions on running tests using pytest or unittest.

Issue To Be Closed : #3 I tried my best, hope it is good enough :)

[iamDyeus]

Great Work @SpreadSheets600 🎊

[SpreadSheets600]

@iamDyeus labels 🥹 hacktoberfest