Create README.md

### Navigation

```

# Additional dependencies:

pip install ai2thor==5.0.0

pip install numpy==1.25.1

# For headless servers, additional setup is required:

# Install required packages

apt-get install -y pciutils

apt-get install -y xorg xserver-xorg-core xserver-xorg-video-dummy

# Start X server in a tmux window

python vagen/env/navigation/startx.py 1

# In another terminal, run:

bash vagen/examples/debug_navigation_vision/run.sh

```