new file structure

inc/content.manager.go

@@ -0,0 +1,19 @@
+package inc
+
+// Content — the composition root for everything the game declares:
+// assets, characters, items, dialogues, scripts and scenes.
+//
+// Each registered entity lives in its own file, named after its category:
+// adding a screen means adding screen.<name>.go and background.<name>.go, plus
+// one line in each category's manager list — nothing else moves.
+
+// registerContent adds every entity to the game. Order matters only in that
+// screens reference backgrounds and characters, which Game.Validate cross-checks.
+func registerContent(w *World) {
+	registerBackground(w)
+	registerCharacter(w)
+	registerItem(w)
+	registerDialog(w)
+	registerScript(w)
+	registerScreen(w)
+}