Add oauth support

- Support azure, bitbucket, github, gitlab, google providers
- Add authentication page to settings

Co-authored-by: Suraj Kumar <srjkmr1024@gmail.com>
Co-authored-by: Michael Castanieto <mcastanieto@gmail.com>
Co-authored-by: Mike Kim <m.kim4247@gmail.com>

config/app.php

@@ -187,6 +187,7 @@ return [
         /*
          * Package Service Providers...
          */
+        \SocialiteProviders\Manager\ServiceProvider::class,
 
         /*
          * Application Service Providers...