[WIP] feat(participant): allow method interception

[ProbablePrime]

This allows us to intercept normally transparent communication on the participant side. It also caches button costs in the same way kind was cached for GA.

Planned psudocode for front-end.

participant.intercept('giveInput', params => {
 if(!allowlist) {
	 const cost = getCost(malm);
	 if(cost > 0) {
       // Confirm DO YOU WANT TO PAY
		return confirm...
     }
 }
return promise.resolve(true);
})

Builds failing because its not done, but just looking for a general review before I go much further.