Set how far one sensor is pitched, in degrees.
Mirrors tbp/monty/frameworks/actions/actions.py::SetSensorPitch: the eye turns while the body stays where it is, which is the difference between this and ...Actions.SetAgentPitch.
tbp/monty/frameworks/actions/actions.py::SetSensorPitch
...Actions.SetAgentPitch
@type t() :: %Monty.Frameworks.Actions.SetSensorPitch{ agent_id: atom() | String.t(), pitch_degrees: float() }