add dialog

dialogable.lua

@@ -0,0 +1,11 @@
+-- Dialogable: a mixin that makes any Entity subclass talkable. `include` it and
+-- give the entity a `self.book` (an Ink book); bumping the entity then opens the
+-- modal Dialogue. npcs, signs, artifacts — anything you can talk to — are just
+-- Dialogables. For now an entity carries one book; later it can swap books as it
+-- progresses. All it does is route a bump to the dialogue manager.
+Dialogable = {}
+
+function Dialogable:onBump()
+	if self.book then Dialogue.open(self.book) end
+	return true
+end