Resource listing sort order is not applied correctly

Description

Sort ordering in the admin panel isn't being applied unless an order has already been applied by the runwayListing scope.

In the method \StatamicRadPack\Runway\Http\Controllers\CP\ResourceListingController::index(...) the following check only successfully applies a user selected sort order if an order has already been applied to the query.

        $query->when($query->getQuery()->orders, function ($query) use ($request) {
            if ($request->input('sort')) {
                $query->reorder($request->input('sort'), $request->input('order'));
            }
        }, fn ($query) => $query->orderBy($resource->orderBy(), $resource->orderByDirection()));

One can see that $query->getQuery()->orders will be null unless $query->orderBy(...) has already been called.

Steps to reproduce

Attempt to apply a non-default sort order in the admin panel for a model that doesn't call $query->orderBy(...) in it's runwayListing scope.

See https://github.com/statamic-rad-pack/runway/commit/c9ec2aec506a195782f18c4924f84ce990266ecb for an examlpe test that reproduces this issue.

Environment

Tests have been executed outside of an application environment.

statamic-rad-pack / runway