Fix C# script metadata creation error due to missing directory

modules/mono/editor/csharp_project.cpp

@@ -228,6 +228,15 @@ Error generate_scripts_metadata(const String &p_project_path, const String &p_ou
 	if (new_dict.size()) {
 		String json = JSON::print(new_dict, "", false);
 
+		String base_dir = p_output_path.get_base_dir();
+
+		if (!DirAccess::exists(base_dir)) {
+			DirAccessRef da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
+
+			Error err = da->make_dir_recursive(base_dir);
+			ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
+		}
+
 		Error ferr;
 		FileAccess *f = FileAccess::open(p_output_path, FileAccess::WRITE, &ferr);
 		ERR_EXPLAIN("Cannot open file for writing: " + p_output_path);