* adds physics material for tool sites in single arm
* adds collision props settings to robot base
* makes zero correspond to open command
* adds collision props to franka, anymal and a1
* cleans up the setting of prim cfg in object classes
* tunes lift env to work with rsl-rl
* enable self collisions in franka
* adds units for physics-related params
* tunes ppo for lift to work
* updates changelog
* adds warp-based state machine for lift environment