Started core API route work

app/Http/Controllers/Api/ApiController.php

@@ -0,0 +1,20 @@
+<?php namespace BookStack\Http\Controllers\Api;
+
+use BookStack\Api\ListingResponseBuilder;
+use BookStack\Http\Controllers\Controller;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Http\JsonResponse;
+
+class ApiController extends Controller
+{
+
+    /**
+     * Provide a paginated listing JSON response in a standard format
+     * taking into account any pagination parameters passed by the user.
+     */
+    protected function apiListingResponse(Builder $query, array $fields): JsonResponse
+    {
+        $listing = new ListingResponseBuilder($query, $fields);
+        return $listing->toResponse();
+    }
+}