Add Facial Expression-Based Move Detection Feature

[omrode1]

This pull request adds a new feature to the chess game that allows players to make moves using facial expressions detected through their webcam. The feature uses a pre-trained neural network model to predict facial expressions and translate them into corresponding chess moves.

Changes Made
Facial Expression Capture and Prediction:

Integrated a webcam capture process using OpenCV to continuously capture facial expressions.
Added a pre-trained model (expression_model.h5) to predict facial expressions.
Mapped predicted expressions to corresponding chess moves using a label map.
Chess Game Integration:

Modified the main game loop to include a separate process for capturing and predicting facial expressions.
Updated the game logic to process moves from the predicted expressions and make the corresponding chess moves.