Initial flame_lua_runtime package

test/runtime/public_api_test.dart

@@ -0,0 +1,20 @@
+import 'package:flame_lua_runtime/flame_lua_runtime.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  test('public runtime API exposes minimal integration surface', () {
+    const repository = AssetGamePackageRepository();
+    const options = RuntimeOptions(runtimeLuaRoot: 'custom/runtime/lua');
+    const widget = LuaGameWidget(
+      gameId: 'template',
+      packageRepository: repository,
+      runtimeOptions: options,
+    );
+
+    expect(widget.gameId, 'template');
+    expect(widget.packageRepository, same(repository));
+    expect(widget.runtimeOptions.runtimeLuaRoot, 'custom/runtime/lua');
+    expect(LuaDardoScriptEngine.new, isA<ScriptEngine Function()>());
+    expect(RuntimeLocaleResolver.localeFromTag('zh-Hans').scriptCode, 'Hans');
+  });
+}