Prettify the frontend code (#8648)

* Add Prettier global configs

* Format js/jsx/ts/tsx/less files

superset/assets/spec/javascripts/profile/RecentActivity_spec.jsx

@@ -28,9 +28,9 @@ describe('RecentActivity', () => {
     user,
   };
   it('is valid', () => {
-    expect(
-      React.isValidElement(<RecentActivity {...mockedProps} />),
-    ).toBe(true);
+    expect(React.isValidElement(<RecentActivity {...mockedProps} />)).toBe(
+      true,
+    );
   });
 
   it('renders a TableLoader', () => {