Renderer add recording / video export #25

[alislaiman496]

Add Video Recording Capability to Robot Simulator

Summary

This PR adds the ability to record robot simulations as video files (MP4/AVI) using OpenCV.

Changes

New Files

• src/simulator/video_recorder.py - OpenCV-based video recording class
• src/simulator/spatial/__init__.py - Package initialization for relative imports

Modified Files

• src/simulator/renderer.py - Integrated frame capture and recording
• src/simulator/main.py - Added CLI arguments for recording control
• src/simulator/world.py - Simplified recording setup
• src/simulator/dynamics/ab_algorithm.py - Fixed scalar extraction bug
• pyproject.toml - Added opencv-python dependency

Fixed Bugs

• Fixed TypeError: setting an array element with a sequence in ABA dynamics
• Fixed ModuleNotFoundError by using relative imports within package

Why OpenCV?

For robotics + AI projects, OpenCV is preferred over alternatives because:

• Industry standard for computer vision
• Real-time camera feed support
• ML/AI integration capability
• Object detection (YOLO, Haar cascades)
• Image processing pipelines

Usage

# Record simulation to MP4
python src/simulator/main.py --record robot_demo.mp4 --steps 200 --fps 15

# Record with a different robot
python src/simulator/main.py --robot tree7 --record tree7_sim.mp4

# Auto-saves to recording_simulation/ folder
python src/simulator/main.py --record my_video.mp4