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/modules/library/lib_items.dm

@@ -70,11 +70,11 @@
 	else
 		return ..()
 
-/obj/structure/bookcase/attack_hand(mob/user as mob)
+/obj/structure/bookcase/attack_hand(mob/living/user)
 	if(contents.len)
 		var/obj/item/book/choice = input("Which book would you like to remove from [src]?") as null|anything in contents
 		if(choice)
-			if(user.incapacitated() || user.lying || !Adjacent(user))
+			if(user.incapacitated() || IS_HORIZONTAL(user) || !Adjacent(user))
 				return
 			if(!user.get_active_hand())
 				user.put_in_hands(choice)