Add trigger action states for impulse pounds

[Jigoku]

Allow mapmodel links to be triggered by the impulse pound ability. Ideally you'd fall straight through the mapmodel when it triggers on collision/contact. This could be combined with trap door models that open, Or even specific models (like a cracked floor panel showing that it can be broken).

This could also allow for creative things like, jump pad triggers that can only be activated by an impulse pound etc.