Add a "capture-kit" for flags

[JexeI]

This differentiates between when a flag is dropped vs captured. If I wanted a regeneration kit to only be applied when a flag is captured to compensate for the lower health of the pickup-kit, I would be able to do that.

[Pugzy]

How would this work with the current drop-kit which as described by docs is applied "when they lose the flag, for whatever reason" which I imagine capturing counts as. Would the capture-kit and drop-kit both be applied or would they be made exclusive for each event?

[JexeI]

It'd be exclusive per event. drop-kit would only be applied if the flag is dropped without being captured.