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();
+    }
+}

app/Http/Controllers/Api/BooksApiController.php

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+<?php namespace BookStack\Http\Controllers\Api;
+
+use BookStack\Entities\Book;
+
+class BooksApiController extends ApiController
+{
+    /**
+     * Get a listing of books visible to the user.
+     */
+    public function index()
+    {
+        $books = Book::visible();
+        return $this->apiListingResponse($books, [
+            'id', 'name', 'slug', 'description', 'created_at', 'updated_at', 'created_by', 'updated_by',
+            'restricted', 'image_id',
+        ]);
+    }
+}