Add Lua debug logging API

lib/runtime/game/lua_game_widget.dart

@@ -1,6 +1,7 @@
 import 'package:flame/game.dart';
 import 'package:flutter/widgets.dart';
 
+import '../diagnostics/runtime_diagnostics.dart';
 import '../packages/game_package_repository.dart';
 import '../scripting/lua_dardo_script_engine.dart';
 import 'flame_lua_game.dart';
@@ -24,10 +25,13 @@ class LuaGameWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final diagnostics = RuntimeDiagnostics();
     return GameWidget(
       game: FlameLuaGame(
-        scriptEngine: LuaDardoScriptEngine(),
-        scriptEngineFactory: LuaDardoScriptEngine.new,
+        scriptEngine: LuaDardoScriptEngine(diagnostics: diagnostics),
+        scriptEngineFactory: () =>
+            LuaDardoScriptEngine(diagnostics: diagnostics),
+        diagnostics: diagnostics,
         packageRepository:
             packageRepository ??
             (serverUrl == null