feat: add RIS fps example with FT42222

[xchux]

This pull request adds a new example script, FT4222_example.py, which demonstrates how to use the python-ft4222 library to configure and trigger an SPI device (specifically, setting a pattern ID and triggering FPS) using the FT4222 chip. The script includes device detection, SPI master initialization, and robust logging to guide users through the process.

The most important changes are:

New Example Script for SPI Communication:

• Added FT4222_example.py as a comprehensive example for initializing an FT4222 device, setting up SPI master mode, and sending commands to configure and trigger FPS on an external device.

Logging and Error Handling:

• Implemented detailed logging for each major step (device detection, opening, initialization, and command execution) and added exception handling to provide clear error messages if something goes wrong.

SPI Command Implementation:

• Introduced the set_fps_config function to encapsulate the logic for sending the pattern ID and trigger commands over SPI, making the code modular and easier to maintain.

[Copilot]

Pull request overview

Adds a new Python example demonstrating how to use the python-ft4222 library to detect an FT4222 device, initialize SPI master mode, and send SPI commands to set a RIS_FPS pattern ID and trigger FPS.

Changes:

• Added FT4222_example.py showcasing FT4222 device discovery and SPI master initialization.
• Implemented set_fps_config() helper to send pattern-ID and trigger commands over SPI.
• Added step-by-step logging and exception handling to guide users through execution.

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