Add Nextcloud OAuth 2.0 login via laravel/socialite

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/services.php

@@ -35,6 +35,13 @@ return [
         ],
     ],
 
+    'nextcloud' => [
+        'client_id'     => env('OAUTH_CLOUDSPICESBLUE_ID'),
+        'client_secret' => env('OAUTH_CLOUDSPICESBLUE_SECRETKEY'),
+        'redirect'      => env('OAUTH_CLOUDSPICESBLUE_REDIRECTURI'),
+        'base_url'      => 'https://cloud.spices.blue',
+    ],
+
     'shopify' => [
         'domain'         => env('SHOPIFY_SHOP_DOMAIN'),
         'access_token'   => env('SHOPIFY_ACCESS_TOKEN'),