docs: update readme

Author: kazupon

README.md

@@ -2,13 +2,11 @@
 
 [![npm](https://img.shields.io/npm/v/@intlify/vue-i18n-extensions/next.svg)](https://www.npmjs.com/package/@intlify/vue-i18n-extensions)
 [![npm](https://img.shields.io/npm/v/@intlify/vue-i18n-extensions.svg)](https://www.npmjs.com/package/@intlify/vue-i18n-extensions)
-[![vue-i18n-extensions Dev Token](https://badge.devtoken.rocks/vue-i18n-extensions)](https://devtoken.rocks/package/vue-i18n-extensions)
 
 Extensions for vue-i18n
 
-## ⚠️ Notice
-
-This `next` branch is development branch for Vue 3! The version for Vue 2 is now in [`master`](https://github.com/intlify/vue-i18n-extensions/tree/master) branch!
+> [!IMPORTANT]
+> This `next` branch is development branch for Vue 3! The version for Vue 2 is now in [`master`](https://github.com/intlify/vue-i18n-extensions/tree/master) branch!
 
 This library exports the following extensions:
 
@@ -20,7 +18,14 @@ This library exports the following extensions:
 ## 💿 Installation
 
 ```sh
-$ npm i --save-dev @intlify/vue-i18n-extensions@next
+# npm
+npm i --save-dev @intlify/vue-i18n-extensions@next
+
+# pnpm
+pnpm add -D @intlify/vue-i18n-extensions@next
+
+# yarn
+yarn add -D @intlify/vue-i18n-extensions@next
 ```
 
 ## 🚀 Extensions
@@ -91,9 +96,9 @@ console.log(await renderToString(app))
 
 You can pre-translation i18n locale messages of vue-i18n.
 
-> :warning: NOTE: Only the scope of global i18n locale messages can be pre-translated !!
+> [!WARNING] **Only the global scope** i18n locale messages can be pre-translated !!
 
-> :warning: NOTE: Currently only `v-t` custom directive is supported !!
+> [!WARNING] only `v-t` custom directive is supported !!
 
 In order to use this feature, you need to specify to Vue compiler option.
 The following example that use `compile` of `@vue/compiler-dom`: