Add Nextcloud OAuth 2.0 login via laravel/socialite

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

composer.json

@@ -9,9 +9,11 @@
         "filament/filament": "^3.2",
         "flowframe/laravel-trend": "^0.3.0",
         "laravel/framework": "^11.9",
+        "laravel/socialite": "^5.31",
         "laravel/tinker": "^2.9",
         "leandrocfe/filament-apex-charts": "^3.1",
         "picqer/php-barcode-generator": "^3.3",
+        "socialiteproviders/nextcloud": "^4.0",
         "spatie/laravel-activitylog": "^4.9",
         "z3d0x/filament-logger": "^0.7.2"
     },