chore: initialize metal recycle flutter app

ohos/hvigorfile.ts

@@ -0,0 +1,8 @@
+import path from 'path'
+import { appTasks } from '@ohos/hvigor-ohos-plugin';
+import { flutterHvigorPlugin } from 'flutter-hvigor-plugin';
+
+export default {
+    system: appTasks,  /* Built-in plugin of Hvigor. It cannot be modified. */
+    plugins:[flutterHvigorPlugin(path.dirname(__dirname))]         /* Custom plugin to extend the functionality of Hvigor. */
+}