Adds a fairly simple system that allows adjusting various numbers like max health, incoming damage, outgoing melee damage, etc. The nice part is that changing certain variables this way (like max health) is a lot safer than manually setting the max health var directly.
Changes a lot of short lines of code to point towards a variable's getter or setter helper instead of reading the var directly so the modifiers can work.
Endoarmor, delayed toxin sting, Enfeebling sting, and recursive adrenaline overdose now use the modifier system.
Enfeebling sting now only lasts two minutes, from five minutes, however it now also reduces the victim's melee damage by 25%/50%, and increases the damage they suffer by 10%/35%, for normal and recursive respectively.
Delayed Toxin Sting's effects are now felt all at once instead of over the course of a few minutes.
* Adds system for turfs to have "footstep sounds" that play when someone walks over them.
* Adds system for floor types (the kind of turfs where you can put tiles on them) to support the footstep sounds.
* Adds sounds to plating, tiles, wood, and carpet floor types.
* Footstep sound system is configurable in game_options.txt, it can be turned off completely or the volume adjusted.
* Port of https://github.com/Baystation12/Baystation12/pull/16942
* Actually tell turfs when a thrown object hits them, and let them decide what to do about it!
* We do this by calling hitby(), which is how it already works for obj and mob, so this makes behavior consistent.
* This allows us to cleanly solve the problem of a thrown object landing on open space without falling.
Port of https://github.com/Baystation12/Baystation12/pull/16941
* Turbolift auto-mapping code assumed that all lift's first floor would be on z=1. Fixed so it picks the first floor instead of the zth floor from the floor list.
* Global procs should start with /proc
* Use to_chat() macro
* Added utility to find all z-levels are connected (transitively adjacent) and utility to test if two levels are connected.
* When water returned null from return_air_for_internal_lifeform() the life code treats that as vacuum. Instead we must return a mixture containing at least some gas.
* It will attempt to use the exhale type for the species, or fall back to carbon_dioxide if it can't find that info.
* Mining turfs generated during random mapgen get their opacity changed
without a call to recalc_atom_opacity() becuase the game ticker has not
started. Make sure we call it even before that point.
