Adding new robot

[sriram-omni]

I am trying to load g1 robot using the xml file and its meshes but getting directory not found error (Cannot GET /examples/scenes/unitree_g1/meshes/g1_29dof_with_hand.xml) in browser console even thought the paths are edited in main.js and mujocoUtils.js. What are the things i need to change to load the model properly?.