[MVCF, Feature Request] Add InvokeOnCommand verb comp #109

This comp will act like an ability invocation: user clicks on gizmo, selects the target, the verb is invoked once. The pawn will not use it by itself otherwise. Once done, the pawn resumes using other verbs.

Motivation: make under barrel launchers. It's possible to do it with abilities, but vanilla can't use more then a single ability equippable comp, so switching ammo isn't possible.