Add OAuth2 authentication (#147)

- Added Site settings > Authentication section
- Create/edit/delete your custom oauth2 configurations
- Login or signup with oauth2

app/javascript/reducers/SiteSettings/generalReducer.ts

@@ -5,7 +5,6 @@ import {
   TENANT_UPDATE_FAILURE,
 } from '../../actions/Tenant/updateTenant';
 
-
 export interface SiteSettingsGeneralState {
   areUpdating: boolean;
   error: string;