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.

app/Http/Resources/V1/Project/ProjectCollection.php

@@ -4,12 +4,11 @@ declare(strict_types=1);
 
 namespace App\Http\Resources\V1\Project;
 
-use App\Http\Resources\PaginatedResourceCollection;
 use App\Models\Project;
 use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\ResourceCollection;
 
-class ProjectCollection extends ResourceCollection implements PaginatedResourceCollection
+class ProjectCollection extends ResourceCollection
 {
     private bool $showBillableRates;