feat(app): wire IGameState+IEvents into Program and SmokePlugin

Pass WorldGameState and WorldEvents into GameWindow so OnLoad fires
FireEntitySpawned and Add for each hydrated entity. SmokePlugin now
subscribes to EntitySpawned in Enable(), unsubscribes in Disable(),
and logs the replay count at subscribe time and total seen at disable.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/AcDream.App/Program.cs

@@ -50,7 +50,7 @@ try
         catch (Exception ex) { Log.Error(ex, "plugin enable failed: {Id}", plugin.Manifest.Id); }
     }
 
-    using var window = new GameWindow(datDir);
+    using var window = new GameWindow(datDir, worldGameState, worldEvents);
     window.Run();
 }
 finally