Implant chair refactor (#19272)

Removes some copypasta
Refactors implant chairs. Adds some fun variations.

code/modules/admin/verbs/onlyone.dm

@@ -20,10 +20,7 @@
 		H.mind.objectives += hijack_objective
 
 		H << "<B>You are the traitor.</B>"
-		var/obj_count = 1
-		for(var/datum/objective/OBJ in H.mind.objectives)
-			H << "<B>Objective #[obj_count]</B>: [OBJ.explanation_text]"
-			obj_count++
+		H.mind.announce_objectives()
 
 		for (var/obj/item/I in H)
 			if (istype(I, /obj/item/weapon/implant))
@@ -67,10 +64,7 @@
 		H.mind.objectives += hijack_objective
 
 		H << "<B>You are the multiverse summoner. Activate your blade to summon copies of yourself from another universe to fight by your side.</B>"
-		var/obj_count = 1
-		for(var/datum/objective/OBJ in H.mind.objectives)
-			H << "<B>Objective #[obj_count]</B>: [OBJ.explanation_text]"
-			obj_count++
+		H.mind.announce_objectives()
 
 		var/obj/item/slot_item_ID = H.get_item_by_slot(slot_wear_id)
 		qdel(slot_item_ID)

code/modules/awaymissions/mission_code/wildwest.dm

@@ -100,10 +100,7 @@
 				hijack.owner = user.mind
 				user.mind.objectives += hijack
 				user << "<B>Your inhibitions are swept away, the bonds of loyalty broken, you are free to murder as you please!</B>"
-				var/obj_count = 1
-				for(var/datum/objective/OBJ in user.mind.objectives)
-					user << "<B>Objective #[obj_count]</B>: [OBJ.explanation_text]"
-					obj_count++
+				user.mind.announce_objectives()
 				user.set_species(/datum/species/shadow)
 			if("Peace")
 				user << "<B>Whatever alien sentience that the Wish Granter possesses is satisfied with your wish. There is a distant wailing as the last of the Faithless begin to die, then silence.</B>"

code/modules/spells/spell_types/rightandwrong.dm

@@ -24,10 +24,7 @@
 			H.mind.objectives += survive
 			H.attack_log += "\[[time_stamp()]\] <font color='red'>Was made into a survivalist, and trusts no one!</font>"
 			H << "<B>You are the survivalist! Your own safety matters above all else, and the only way to ensure your safety is to stockpile weapons! Grab as many guns as possible, by any means necessary. Kill anyone who gets in your way.</B>"
-			var/obj_count = 1
-			for(var/datum/objective/OBJ in H.mind.objectives)
-				H << "<B>Objective #[obj_count]</B>: [OBJ.explanation_text]"
-				obj_count++
+			H.mind.announce_objectives()
 		var/randomizeguns 			= pick(gunslist)
 		var/randomizemagic 			= pick(magiclist)
 		var/randomizemagicspecial 	= pick(magicspeciallist)