[nostalgia/studio] Add save action and cleanup

src/nostalgia/studio/json_err.hpp

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2016 - 2019 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+namespace nostalgia::studio {
+
+enum {
+	JSON_ERR_FIELD_MISSING = 1,
+	JSON_ERR_UNEXPECTED_TYPE = 2,
+};
+
+}