For a robust crafting system, I need a new materials framework.
For a new materials framework, I need to clean up reagents.
To clean up reagents, I need to pare down foods from reagent holders.
To pare down foods from reagent holders, I need to port edibility
components.
To port edibility components, I need to port processing components.
To port processing components, I need to port tool behaviors.
This is all back-end code, no new features or functionality from this.
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.
Unified most of the procs into one definition, so there are no duplicate
around the codebase.
Marked some of the above as overridable if a good enough case can be
made for them (eg. external dependency or unlikely to be used).
