Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/boards/model/errorResponse.go

@@ -0,0 +1,16 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+// ErrorResponse is an error response
+// swagger:model
+type ErrorResponse struct {
+	// The error message
+	// required: false
+	Error string `json:"error"`
+
+	// The error code
+	// required: false
+	ErrorCode int `json:"errorCode"`
+}