Update face-detection-attendance-system-using-OpenCV

**Is your feature request related to a problem? Please describe.**
Currently this code is a bit genralized so i would like to enhance it.
This is for GSSOC'24
**Describe the solution you'd like**
The Ways that I have currently Improved this code--->

Use a DATA_PATH variable to organize your data

Break down the code into functions (like load_known_faces, mark_attendance, and recognize_faces) for better structure and
reusability.

Append attendance records to a CSV file (like attendance.csv) for easy record-keeping.

Display recognized faces with green rectangles and namesand use red rectangles for unknown faces.

Enable the user to exit the system using the 'q' key.

Added Comments for better Understanding

Can you please assign me this😊