Enhance mujoco_server.py and README.md for improved teleoperation and environment management

Enhance UR5e robot control with orientation tracking and UI updates

Update QuadrupedPyMPCController for enhanced strafe motion dynamics

Enhance Spot robot control by integrating PyMPC and MPC Gait controllers

Refactor Spot and G1 robot model paths and add new assets

Add Docker support with Dockerfile, docker-compose.yml, and .dockerignore

Enhance SpotEnv initialization by adding framebuffer size overrides for higher resolution rendering.

Initial commit: Nova Sim unified robot simulation platform