docs: update introduction

Author: UNIkeEN

content/en/docs/index.mdx

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 # Introduction
+
+SJMC Launcher is a modern, cross-platform Minecraft launcher built on the Tauri framework, independently developed by members of the Shanghai Jiao Tong University Minecraft Club.
+
+## Features
+
+* **Cross Platform**: Supports Windows 10/11, macOS and Linux.
+* **Efficient Instance Management**: Supports multiple game directories and instances, allowing the management of all instance resources (such as saves, mods, resource packs, shaders, screenshots, etc.) and settings in one place.
+* **Convenient Resource Download**: Supports downloading game clients, mod loaders, various game resources and modpacks from CurseForge and Modrinth.
+* **Multi-Account System Support**: Built-in Microsoft login and third-party authentication server support, compatible with the OAuth login process proposed by the Yggdrasil Connect proposal.
+* **Deeplink Integration**: Integrates with external websites and tool collections, providing convenient features such as desktop shortcuts for launching instances through system deeplinks.
+
+> Note: some features may be limited by region, platform, or bundle type.
+
+### Built with
+
+[![Tauri](https://img.shields.io/badge/Tauri-v2-FFC131?style=for-the-badge&logo=tauri&logoColor=white&labelColor=24C8DB)](https://tauri.app/)
+[![Next JS](https://img.shields.io/badge/next.js-000000?style=for-the-badge&logo=nextdotjs&logoColor=white)](https://nextjs.org/)
+[![Chakra UI](https://img.shields.io/badge/chakra_ui-v2-38B2AC?style=for-the-badge&logo=chakraui&logoColor=white&labelColor=319795)](https://v2.chakra-ui.com/)

content/zh/docs/index.mdx

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-# 简介
+# 简介
+
+SJMC Launcher 是一款基于 Tauri 框架打造的现代化、跨平台 Minecraft 启动器，由上海交通大学 Minecraft 社的成员自主开发。
+
+## 功能特性
+
+* **跨平台支持**：兼容 Windows 10/11、macOS 与 Linux。
+* **高效的实例管理**：支持多个游戏目录与实例，集中管理所有实例资源（如存档、模组、资源包、光影包、截图等）与设置。
+* **便捷的资源下载**：支持从 CurseForge 与 Modrinth 等源下载游戏客户端、Mod 加载器、各类游戏资源与整合包。
+* **多账户系统支持**：内置 Microsoft 登录与第三方认证服务器支持，兼容 Yggdrasil Connect 的 OAuth 登录流程规范提案。
+* **深度链接集成**：可与外部网站与工具集联动，支持通过系统深度链接、桌面快捷方式一键启动实例等便捷功能。
+
+> 注意：部分功能可能受地区、运行平台或程序分发类型限制。
+
+### 技术栈
+
+[![Tauri](https://img.shields.io/badge/Tauri-v2-FFC131?style=for-the-badge&logo=tauri&logoColor=white&labelColor=24C8DB)](https://tauri.app/)
+[![Next JS](https://img.shields.io/badge/next.js-000000?style=for-the-badge&logo=nextdotjs&logoColor=white)](https://nextjs.org/)
+[![Chakra UI](https://img.shields.io/badge/chakra_ui-v2-38B2AC?style=for-the-badge&logo=chakraui&logoColor=white&labelColor=319795)](https://v2.chakra-ui.com/)