repaths /decal/cleanable to /debris/cleanable to prep for persistence serialization (#4359)

* wild

* regex maps

* regex code

* that

Co-authored-by: VM_USER <VM_USER>

code/game/objects/effects/_effect.dm

@@ -0,0 +1,12 @@
+/**
+ * effect supertype
+ *
+ * currently does nothing
+ *
+ * "weakly interactive visual objects" should usually go under this, especially if they're temporary/short lasting
+ *
+ * these, however, have full object damgae/interaction support, so it's not limited to those
+ *
+ * however, at a certain point, do consider using /structure or /machinery instead.
+ */
+/obj/effect