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/scripts/build.js

@@ -0,0 +1,73 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+/* eslint-disable no-console */
+
+const chalk = require('chalk');
+const concurrently = require('concurrently');
+
+const {getPlatformCommands} = require('./utils.js');
+
+async function buildAll() {
+    console.log(chalk.inverse.bold('Building subpackages...') + '\n');
+
+    try {
+        const {result} = concurrently(
+            getPlatformCommands('build'),
+            {
+                killOthers: 'failure',
+            },
+        );
+
+        await result;
+    } catch (e) {
+        console.error(chalk.inverse.bold.red('Failed to build subpackages'), e);
+        return;
+    }
+
+    console.log('\n' + chalk.inverse.bold('Subpackages built! Building web app...') + '\n');
+
+    // It's not necessary to run these commands through concurrently, but it makes the output consistent
+
+    try {
+        const {result} = concurrently([
+            {command: 'npm:build --workspace=channels', name: 'webapp', prefixColor: 'cyan'},
+        ]);
+        await result;
+    } catch (e) {
+        console.error(chalk.inverse.bold.red('Failed to build web app'), e);
+        return;
+    }
+
+    console.log('\n' + chalk.inverse.bold('Web app built! '));
+
+    console.log(chalk.inverse.bold('Building Boards...') + '\n');
+
+    try {
+        const {result} = concurrently([
+            {command: 'npm:build --workspace=boards', name: 'boards', prefixColor: 'blue'},
+        ]);
+        await result;
+    } catch (e) {
+        console.error(chalk.inverse.bold.red('Failed to build Boards'), e);
+        return;
+    }
+
+    console.log('\n' + chalk.inverse.bold('Boards built! '));
+
+    console.log(chalk.inverse.bold('Building Playbooks...') + '\n');
+
+    try {
+        const {result} = concurrently([
+            {command: 'npm:build --workspace=playbooks', name: 'playbooks', prefixColor: 'red'},
+        ]);
+        await result;
+    } catch (e) {
+        console.error(chalk.inverse.bold.red('Failed to build Playbooks'), e);
+        return;
+    }
+
+    console.log('\n' + chalk.inverse.bold('Playbooks built! '));
+}
+
+buildAll();