when it was useless otherwise

With trivial factorizations,
to avoid code duplication and ease future robot addition.

While here:
- deprecate `loadTalosLegs()` for the factorized `loadTalos(legs=True)`
- use cleaner `os.path.join()` for file path manipulation instead of
  string concatenation

which is the standard way of using pinocchio, according to its examples
and unittests.

Fix windows issues

sync submodule

Add Panda robot

edit: fix meshes with meshlab

Add missing license file

package.xml: Add catkin/ament_cmake runtime dependency for packaging

Required by REP-136

Reverted back removation of base_inertia + added tiny inertia in base

Use pinocchio model for internal functions

With this approach, we could reuse this method without the needed of
using RobotWrapper.