Update annotations to OpenApi 3

Most of the API annotations are directly converted. The changes in meaning are:
- Parameters "in body" is not supported anymore. These are changed to "in query" or to a request body (depending on the code).

src/Wallabag/ApiBundle/Controller/SearchRestController.php

@@ -5,9 +5,9 @@ namespace Wallabag\ApiBundle\Controller;
 use Hateoas\Configuration\Route as HateoasRoute;
 use Hateoas\Representation\Factory\PagerfantaFactory;
 use Nelmio\ApiDocBundle\Annotation\Operation;
+use OpenApi\Annotations as OA;
 use Pagerfanta\Doctrine\ORM\QueryAdapter as DoctrineORMAdapter;
 use Pagerfanta\Pagerfanta;
-use Swagger\Annotations as SWG;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -21,34 +21,34 @@ class SearchRestController extends WallabagRestController
      * @Operation(
      *     tags={"Search"},
      *     summary="Search all entries by term.",
-     *     @SWG\Parameter(
+     *     @OA\Parameter(
      *         name="term",
-     *         in="body",
+     *         in="query",
      *         description="Any query term",
      *         required=false,
-     *         @SWG\Schema(type="string")
+     *         @OA\Schema(type="string")
      *     ),
-     *     @SWG\Parameter(
+     *     @OA\Parameter(
      *         name="page",
-     *         in="body",
+     *         in="query",
      *         description="what page you want.",
      *         required=false,
-     *         @SWG\Schema(
+     *         @OA\Schema(
      *             type="integer",
      *             default=1
      *         )
      *     ),
-     *     @SWG\Parameter(
+     *     @OA\Parameter(
      *         name="perPage",
-     *         in="body",
+     *         in="query",
      *         description="results per page.",
      *         required=false,
-     *         @SWG\Schema(
+     *         @OA\Schema(
      *             type="integer",
      *             default=30
      *         )
      *     ),
-     *     @SWG\Response(
+     *     @OA\Response(
      *         response="200",
      *         description="Returned when successful"
      *     )