Fix API docs generation with Scramble 0.13

Scramble 0.13 moved the collected resource type of resource collections
to a different template slot, which broke the custom paginated resource
collection extension and the API docs export. Scramble now infers
paginated responses natively, so the extension, the marker interface and
the @return annotations that overrode the inference are removed.

Scramble 0.13 also documents closure routes, so the API fallback routes
are moved to a controller that is excluded from the docs.

Add a test that exports the API docs.

config/scramble.php

@@ -3,7 +3,6 @@
 declare(strict_types=1);
 
 use App\Extensions\Scramble\ApiExceptionTypeToSchema;
-use App\Extensions\Scramble\PaginatedResourceCollectionTypeToSchema;
 use Dedoc\Scramble\Http\Middleware\RestrictedDocsAccess;
 
 return [
@@ -101,6 +100,5 @@ MD,
 
     'extensions' => [
         ApiExceptionTypeToSchema::class,
-        PaginatedResourceCollectionTypeToSchema::class,
     ],
 ];