Improved Error Handling and Feedback in Face Recognition Module

[benjisho]

This pull request introduces several improvements to the face_recog.py.

Added checks and error handling for the if conditions, including:

• When no face encodings are found.
• When no match is found in the matches list.
• When the face label does not match the expected label.
• When the file specified by tmp_path does not exist.
• When the operating system is not supported.

In addition, provided feedback to improve debugging process and visualizing the program flow. These changes improve overall reliability and usability.