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/platform/components/rollup.config.js

@@ -0,0 +1,44 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// eslint-disable-next-line import/no-unresolved
+import resolve from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import scss from 'rollup-plugin-scss';
+import typescript from '@rollup/plugin-typescript';
+
+import packagejson from './package.json';
+
+const externals = [
+    ...Object.keys(packagejson.dependencies || {}),
+    ...Object.keys(packagejson.peerDependencies || {}),
+    'mattermost-redux',
+    'reselect',
+];
+
+export default [
+    {
+        input: 'src/index.tsx',
+        output: [
+            {
+                sourcemap: true,
+                file: packagejson.module,
+                format: 'es',
+                globals: {'styled-components': 'styled'},
+            },
+        ],
+        plugins: [
+            scss(),
+            resolve({
+                browser: true,
+                extensions: ['.ts', '.tsx'],
+            }),
+            commonjs(),
+            typescript(),
+        ],
+        external: (pkg) => externals.some((external) => pkg.startsWith(external)),
+        watch: {
+            clearScreen: false,
+        },
+    },
+];