Add method to check if an API exists for a given name

module/Core/src/Repository/EntityRepositoryInterface.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\Repository;
+
+use Doctrine\Persistence\ObjectRepository;
+
+/**
+ * @template T of object
+ * @extends ObjectRepository<T>
+ */
+interface EntityRepositoryInterface extends ObjectRepository
+{
+    /**
+     * @todo This should be part of ObjectRepository, so adding here until that interface defines it.
+     *       EntityRepository already implements the method, so classes extending it won't have to add anything.
+     */
+    public function count(array $criteria = []): int;
+}