Fix the bundle path to support the new bundle structure

Without the proper definition of the bundle path, the templates are not
discovered by TwigBundle when placed in the new location.

Author: stof

src/KnpMenuBundle.php

@@ -24,4 +24,9 @@ public function build(ContainerBuilder $container): void
         $container->addCompilerPass(new AddRenderersPass());
         $container->addCompilerPass(new AddVotersPass());
     }
+
+    public function getPath(): string
+    {
+        return \dirname(__DIR__);
+    }
 }