onJump trigger

Summary

Adds an onJump trigger that trigger skills when the mob jumps.

Usage

So we already have a mechanic onJump, why not also add a same functioning trigger? It'll surely be helpful for skill configuring.

Value

With a direct onJump trigger we'll no longer need to periodically apply an onJump aura to a mob, simplifying mob configurations and may also reduce CPU resource costing.

Priority

Low priority, but don't need lots of times to implement as it shall not be hard?

Implementation

An onJump trigger.