Consider built-in operators for switching object state

[glopesdev]

This might be a single operator similar to UpdateRenderState in the shaders package, where the user can choose from a list of options which ones to apply to the object, or it might be a set of individual operators to allow dynamic property mapping.

The goal is to make it easier to switch certain basic binary states in geoms and bodies, such as Enabled or Kinematic, but also potentially other numerical properties related to CFM, ERP, etc.