xenomorph maid reskin for byond members (#18545)

Adds a new sprite that byond members can access when being the xenomorph queen

code/modules/mob/living/carbon/alien/humanoid/caste/praetorian.dm

@@ -40,8 +40,19 @@
 		return 0
 	if(!alien_type_present(/mob/living/carbon/alien/humanoid/royal/queen))
 		var/mob/living/carbon/alien/humanoid/royal/queen/new_xeno = new (user.loc)
+		if(user.client.prefs.unlock_content) //check the player is a donator
+			switch(alert("Would you like to use your alternative skin?",,"Yes","No"))
+				if("Yes")
+					new_xeno.maidify()
+				if("No")
+					user << "You decide against the xeno fetish outfit"
 		user.alien_evolve(new_xeno)
 		return 1
 	else
 		user << "<span class='notice'>We already have an alive queen.</span>"
-		return 0
+		return 0
+
+/mob/living/carbon/alien/humanoid/royal/queen/proc/maidify()
+    name = "alien queen maid"
+    icon_state = "alienqmaid"
+    caste = "qmaid"