Added support for NVS in console example

examples/system/console/components/cmd_nvs/cmd_nvs.h

@@ -0,0 +1,21 @@
+/* Console example — declarations of command registration functions.
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Register NVS functions
+void register_nvs();
+
+#ifdef __cplusplus
+}
+#endif
+