Refactored hitby to be in line with TG's version.
Refactored item weight defines to a more clear naming scheme, also in
line with TG's version.
Refactored how the movement bumps are handled, ported signals to handle
them, in preparation for the movement update.
Fixed disposal hit bouncing the hitting atom on the wall.
Items do not push other items anymore if they are tiny.
Added LIGHTSTEP to the syndi no-slip shoes. This prevents you from activating mouse traps and landmines while wearing them, as well as letting you dodge past soap, banana peels, and oil spills.
This shit is just full of issues that keep popping up and frankly I can't be fucked to deal with them.
Note: I'll probably do the same thing again but very simplified later on. This iteration is a mistake in how much of a mess it is, unfortunately.
Now this might actually be the last of the ports before I actually code things I swear.
Ports Baystation12/Baystation12#25773 and adds sprinting by holding the shift key, also adding the option to add more movement intents for species with their own slowdown etc etc.
