docs(installation): improve

docs/content/1.getting-started/2.installation.md

@@ -7,13 +7,29 @@ description: 'Learn how to install and configure Nuxt UI in your application.'
 
 ### Add to a Nuxt project
 
-1. Add `@nuxt/ui` module to your project:
+1. Install the `@nuxt/ui` dependency in your project:
 
-```bash
-npx nuxi@latest module add ui
+::code-group
+
+```bash [pnpm]
+pnpm add @nuxt/ui@2
 ```
 
-2. Add it to the `modules` section in your `nuxt.config.ts`:
+```bash [yarn]
+yarn add @nuxt/ui@2
+```
+
+```bash [npm]
+npm install @nuxt/ui@2
+```
+
+```bash [bun]
+bun add @nuxt/ui@2
+```
+
+::
+
+2. Register the `@nuxt/ui` module in your `nuxt.config.ts`:
 
 ```ts [nuxt.config.ts]
 export default defineNuxtConfig({