Get end effector URDF that is movable

[Roozki]

"EE" or "ee" = end effector

We need to go back to Solidworks, and export an end effector as a separate URDF

This will probably look like 3 links, one for the base of the EE, and one for each "finger" of the EE.
Then, each "finger" can probably be attached with a planar joint, with axis being like the X axis of the end effector base.