docs(account-settings): Account Settings intro docs (#3127)

* Add intro contents

* trigger ci

* Update docs/src/pages/[platform]/connected-components/account-settings/index.page.mdx

* Update docs/src/pages/[platform]/connected-components/account-settings/index.page.mdx

* Update docs/src/pages/[platform]/connected-components/account-settings/index.page.mdx

docs/src/pages/[platform]/connected-components/account-settings/index.page.mdx

@@ -4,7 +4,9 @@ description: Amplify UI provides account settings components to manage account s
 supportedFrameworks: react
 ---
 
+import { Alert, Tabs, TabItem } from '@aws-amplify/ui-react';
 import { Fragment } from '@/components/Fragment';
+import { InstallScripts } from '@/components/InstallScripts';
 import { getCustomStaticPath } from '@/utils/getCustomStaticPath';
 import { DeveloperPreview } from './DeveloperPreview';
 
@@ -21,7 +23,39 @@ export async function getStaticProps() {
 
 <DeveloperPreview />
 
-## Account Settings
+Account Settings components are a set of standalone components that add [user management](https://docs.amplify.aws/lib/auth/manageusers/q/platform/js/) flows to your application with minimal boilerplate.
 
-TODO
+<Alert variation="warning">
+  Account Settings components require end user to be authenticated. You can use the [`Authenticator`](/connected-components/authenticator) component to add authentication UI to your application.
+</Alert>
 
+## Quick Start
+
+### Step 1. Configure Backend
+
+Account settings components work seamlessly with the [Amplify CLI](https://docs.amplify.aws/cli/start/install/)
+to **automatically** work with your backend.
+
+First, update `@aws-amplify/cli` with [npm](https://www.npmjs.com/) or [yarn](https://yarnpkg.com/)
+if you're using a version before `6.4.0`:
+
+<Tabs>
+<TabItem title="npm">
+
+```shell
+npm install -g @aws-amplify/cli@latest
+```
+
+</TabItem>
+<TabItem title="yarn">
+
+```shell
+yarn global add @aws-amplify/cli@latest
+```
+
+</TabItem>
+</Tabs>
+
+### Step 2. Install Dependencies
+
+<InstallScripts />