Writes a sensor transform into the current project.
mix monty_cad.gen.transform surface_smootherTwo files: lib/<app>/plugins/surface_smoother.ex — the one callback
Monty.SensorModules.SensorModule.Transform requires, answering the payload it
changed and itself as it now stands — and a test that asserts the module is a
transform.
call/3 raises until the stage does something. Two answers are honest without
a decision: the payload untouched, for a stage whose feature this run does not
use, and a percept made from the observation, which
MontyCad.Percept.message/1 already does for a CAD frame.