[Design/Routes] Welcome Screen / Initial Setup (#42)

* feat(new component): welcome screen and initial setup component

* feat(frontend): setup with login, settings, radarr/sonarr

* feat(frontend): add login functionality to login step for setup

Co-authored-by: Alexander Zoitos <azoitos1@gmail.com>

src/components/PlexLoginButton/index.tsx

@@ -18,8 +18,8 @@ const PlexLoginButton: React.FC<PlexLoginButtonProps> = ({
     setLoading(true);
     try {
       const authToken = await plexOAuth.login();
-      onAuthToken(authToken);
       setLoading(false);
+      onAuthToken(authToken);
     } catch (e) {
       if (onError) {
         onError(e.message);