Fix Indentation Issues and Improve Code Readability in BCJA.py

[Sachin-NK]

This pull request addresses the inconsistent use of tabs and spaces in the BCJA.py script, leading to better code readability and maintenance. The following changes were made:

• Corrected inconsistent indentation throughout the entire script.
• Reformatted the code to ensure uniform use of spaces for indentation.
• Organized sections for face detection, scene change, gaze direction, and head pose modules for better clarity.
• Improved the overall structure and presentation of the code.

These changes should help maintain a clean and consistent codebase

Related Issue
#3