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/plasticflaps.dm

@@ -71,7 +71,7 @@
 			return TRUE
 		if(M.buckled && istype(M.buckled, /mob/living/simple_animal/bot/mulebot)) // mulebot passenger gets a free pass.
 			return TRUE
-		if(!M.lying && !M.ventcrawler && M.mob_size != MOB_SIZE_TINY)	//If your not laying down, or a ventcrawler or a small creature, no pass.
+		if(!IS_HORIZONTAL(M) && !M.ventcrawler && M.mob_size != MOB_SIZE_TINY)	//If your not laying down, or a ventcrawler or a small creature, no pass.
 			return FALSE
 	return ..()