Refactors language holder (#48106)

* Language holder refactor

* Ironed out bugs, testing

* adds sourced language, blocking list. more useful helpers.

* Replaced old usage

* Adresses requests

* Autodoc attempt #1

* Fixed monkeyize (again)

* Travis happy

* Language menu updated

* Final pass

code/modules/projectiles/projectile/magic.dm

@@ -276,7 +276,6 @@
 
 	if(!new_mob)
 		return
-	new_mob.grant_language(/datum/language/common)
 
 	// Some forms can still wear some items
 	for(var/obj/item/W in contents)