Remove unused image 'living_room_2.jpeg' from IMAGE_PATHS and update corresponding labels in app.py for clarity.

Update image assets and refactor app.py for improved functionality. Added new images, removed outdated ones, and updated paths in IMAGE_PATHS. Renamed render_demo3 function to render_demonstrate for clarity. Adjusted UI styles and fixed image loading issues.

Add initial project structure with core files, configurations, and sample images