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

webapp/playbooks/scripts/deploy.js

@@ -0,0 +1,16 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+/* eslint-disable no-console */
+
+const fs = require('fs');
+
+async function deploy() {
+    const target = '../channels/dist/products/playbooks';
+    if (!fs.existsSync(target)) {
+        fs.mkdirSync(target, {recursive: true});
+    }
+    fs.cpSync('dist', target, {recursive: true});
+}
+
+deploy();