Adds crawling. (#17899)

* crawling?

* knockdown. CONTAINS CHANGES THAT NEED REVERTING

* plotting can_moves death

* CANMOVE IS DEAD

* mappers are insane

* removes todos as the are todone

* decreases crawling speed

* silly-con fixes

* surgery fixes

* fixes death

* pAI fixes

* removes var/lying

* runtime fix

* decreases default crawling speed

* correct crawling dir

* some more fixes

* stunbaton tweak, revert later

* rejuv fix

* restraint and incapacitated refactor

* crawling dir in line with TG

* fixes vehicle movement and grabs

* alien rest fixes

* antistun fixes

* fixed fall sounds

* forgor to stage this

* first review

* canmove zombie dispersal

* fix

* lots of fixes

* defines

* fixes the trait helper

* if you got no legs you can still crawl

* sillyconfix

* no reverty keepy

* jaunt fix

* hopefully fixes perma sleepy zzz

* admin rejuv temp fix

* rest canceling

* antistun chems now remove knockdown

* buckle offset fix

* fixes some stuff

* crawling delay = 4

* descuffs bed

* sleeping hotfix

* fixes simple mob resting

* V is the macro for resting

* projectiles no dodgy

* refines the projectile check

* god I hate strings

* MORE FIXES

* I hate buckling

* fixes capulettium plus

* winding down

* farie review

* bugs did stop showing up

* SEAN

* todo

* sean review

* ed209

* i HATE cyborgs

* steel review

* laaaaaast things

* reverts stun baton changes

* and done

code/game/objects/structures.dm

@@ -92,7 +92,8 @@
 
 	for(var/mob/living/M in get_turf(src))
 
-		if(M.lying) return //No spamming this on people.
+		if(IS_HORIZONTAL(M))
+			return //No spamming this on people.
 
 		M.Weaken(10 SECONDS)
 		to_chat(M, "<span class='warning'>You topple as \the [src] moves under you!</span>")
@@ -140,7 +141,7 @@
 	if(user.restrained() || user.buckled)
 		to_chat(user, "<span class='notice'>You need your hands and legs free for this.</span>")
 		return 0
-	if(user.stat || user.IsParalyzed() || user.IsSleeping() || user.lying || user.IsWeakened())
+	if(HAS_TRAIT(user, TRAIT_HANDS_BLOCKED))
 		return 0
 	if(issilicon(user))
 		to_chat(user, "<span class='notice'>You need hands for this.</span>")