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* alex description added

* modified meshes - size reduced - readme and license added

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* Add go2 description

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

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before:
```
8.9M robots/asr_twodof_description/qb_meshes/dae/qbmove_frame_m.dae
7.2M robots/baxter_description/meshes/electric_gripper/electric_gripper_w_fingers.DAE
4.9M robots/baxter_description/meshes/torso/base_link.DAE
 88M robots/go1_description/meshes/trunk.dae
```

after:
```
1.7M robots/asr_twodof_description/qb_meshes/dae/qbmove_frame_m.dae
2.2M robots/baxter_description/meshes/electric_gripper/electric_gripper_w_fingers.DAE
2.6M robots/baxter_description/meshes/torso/base_link.DAE
 28M robots/go1_description/meshes/trunk.dae
```

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Resolves #146

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Created the Gazebo URDF from upstream franka_description package and
then manually merged the inertials and new TCP frame into our packaged
URDF. Should fix #122

Note: There are two types of URDFs in the upstream repository. One also
has simplified, larger collision shapes. Since we possibly want to
simulate using the URDFs here, I kept the configuration using the convex
meshes rather than primitive shapes.

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