Unit test

[misarb]

This pull request introduces a suite of unit tests for the G29 library. The main focus of these tests is to ensure the correct functionality of the G29 library methods and to verify that the integration with the hidAPI interface operates as expected.
Changes Made:

Unit Tests Implementation:
    Developed a series of unit tests covering all critical functionalities of the G29 library, including button state updates and event handling.
    Each test case aims to validate the expected behavior of the library methods under various conditions.

Mocking the hidAPI Interface:
    Implemented a mock version of the hidAPI interface to simulate hardware interactions. This allows for testing the G29 library without requiring physical hardware, facilitating a controlled and reproducible testing environment.
    The mock interface simulates the responses of the hardware, enabling us to test how the G29 library handles different button states and inputs from the device.