[Refactor] App.jsx: Distribute controllers to each files.

src-ui/app/_app_controllers/index.js

@@ -0,0 +1,6 @@
+export { StartPythonController } from "./StartPythonController";
+export { UiLanguageController } from "./UiLanguageController";
+export { ConfigPageCloseTriggerController } from "./ConfigPageCloseTriggerController";
+export { UiSizeController } from "./UiSizeController";
+export { FontFamilyController } from "./FontFamilyController";
+export { TransparencyController } from "./TransparencyController";