Add SO-101 camera mass asset

.gitattributes

@@ -60,3 +60,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
 robot_assets/g1_29dof_tri_hand_closed.usd filter=lfs diff=lfs merge=lfs -text
 robot_assets/h1_updated_arm_masses_no_gripper.usd filter=lfs diff=lfs merge=lfs -text
+robot_assets/so101_camera_mass_23g_at_camera.usd filter=lfs diff=lfs merge=lfs -text

robot_assets/so101_camera_mass_23g_at_camera.usd

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d25d09201be7cdc49b91528113e91768987a30412bc995a0abd14a45effd1b0f
+size 23485879