add prettier for auto formatting (#231)

* [Prettier] Add "prettier"

Makes the formatting of the code consistent.
By using the eslint-plugin-prettier formatting issues will be highlighted as a lint error.
These errors will be auto fixed by running "lint --fix" (which can be done automatically on file save)

* [Prettier] Add "prettier" - Fix formatting

src/screens/settings/About.tsx

@@ -10,7 +10,10 @@ import { useQuery } from 'util/client';
 export default function About() {
     const { setTitle, setAction } = useContext(NavbarContext);
 
-    useEffect(() => { setTitle('About'); setAction(<></>); }, []);
+    useEffect(() => {
+        setTitle('About');
+        setAction(<></>);
+    }, []);
 
     const { data: about } = useQuery<IAbout>('/api/v1/settings/about');