Cult backend rework + new features. (#8996)

Guess who the baton passes to.

Convert all runes to datums

Rework arcane tome mechanics, holy shit it's terrible

Convert rune effects to actually use rune datums

Add additional effects that are now possible because of non-shitcode code

code/modules/spell_system/spells/spell_list/self/generic/rune_write.dm

@@ -20,20 +20,16 @@
 	if(!isturf(user.loc))
 		to_chat(user, span("warning", "You do not have enough space to write a proper rune."))
 
-	var/rune = input(user, "Choose a rune to scribe", "Rune Scribing") in rune_types //not cancellable.
+	var/rune = input(user, "Choose a rune to scribe", "Rune Scribing") as null|anything in SScult.runes_by_name//not cancellable.
 	if(locate(/obj/effect/rune) in get_turf(user))
 		to_chat(user, span("warning", "There is already a rune in this location."))
 		return
 
-	var/rune_path = rune_types[rune]
-	var/obj/effect/rune/R = new rune_path(get_turf(user))
+	if(!rune)
+		return
 
-	var/network
-	if(istype(R, /obj/effect/rune/teleport))
-		network = input(user, "Choose a teleportation network for the rune to connect to.", "Teleport Rune") in teleport_network
-	if(network)
-		R.network = network
-	R.cult_description = rune
+	var/RD = SScult.runes_by_name[rune]
+	var/obj/effect/rune/R = new(get_turf(user), RD)
 	R.color = "#A10808"
 
 	var/area/A = get_area(R)