docs: update language links and improve formatting in README files (#88)

## Summary by Sourcery

Improve bilingual README structure and formatting for clarity and
consistency.

Documentation:
- Add cross-links between English and Chinese READMEs for easier
language switching.
- Normalize README formatting including roadmap link styling, spacing,
and license section presentation in both languages.

4 files changed, 29 insertions, 9 deletions

diff --git a/.markdownlint.json b/.markdownlint.json
new file mode 100644
index 0000000..4c98f54
--- /dev/null
+++ b/.markdownlint.json
@@ -0,0 +1,5 @@
+{
+  "MD013": false,
+  "MD033": false,
+  "MD041": false
+}
diff --git a/README.CN.md b/README.CN.md
index ff5cdd4..69773c6 100644
--- a/README.CN.md
+++ b/README.CN.md
@@ -1,5 +1,7 @@
 # Drop*O*ut
 
+[English](README.md) | 中文
+
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=small)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_small)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit)](https://github.com/pre-commit/pre-commit)
 [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/HsiangNianian/DropOut/main.svg)](https://results.pre-commit.ci/latest/github/HsiangNianian/DropOut/main)
@@ -9,7 +11,7 @@
 [![Semifold CI](https://github.com/HydroRoll-Team/DropOut/actions/workflows/semifold-ci.yaml/badge.svg)](https://github.com/HydroRoll-Team/DropOut/actions/workflows/release.yml)
 [![Test & Build](https://github.com/HydroRoll-Team/DropOut/actions/workflows/test.yml/badge.svg)](https://github.com/HydroRoll-Team/DropOut/actions/workflows/test.yml)
 
-DropOut 是一个现代的、可重现的、开发者级别的 Minecraft 启动器。
+DropOut 是一个现代的、可复现的、开发者级别的 Minecraft 启动器。
 它不仅仅是为了启动 Minecraft 而设计的，而是将 Minecraft 环境作为确定性的、版本化的工作空间进行管理。
 
 使用 Tauri v2 和 Rust 构建，DropOut 提供原生性能和最小资源使用，并配有现代响应式 Web UI（目前使用 Svelte 5，正在迁移到 React）。
@@ -98,6 +100,7 @@ DropOut 专注于保持你的游戏稳定、可调试和可重现。
    git clone https://github.com/HsiangNianian/DropOut.git
    cd DropOut
    ```
+
 2. **安装前端依赖**
 
    ```bash
@@ -105,12 +108,14 @@ DropOut 专注于保持你的游戏稳定、可调试和可重现。
    pnpm install
    cd ..
    ```
+
 3. **运行开发模式**
 
    ```bash
    # 这将启动前端服务器和 Tauri 应用窗口
    cargo tauri dev
    ```
+
 4. **构建发布版本**
 
    ```bash
@@ -123,6 +128,7 @@ DropOut 专注于保持你的游戏稳定、可调试和可重现。
 
 DropOut 以长期可维护性为目标构建。
 欢迎贡献，尤其在这些领域：
+
 - 实例系统设计
 - 模组兼容性工具
 - UI/UX 改进
@@ -131,12 +137,11 @@ DropOut 以长期可维护性为目标构建。
 标准的 GitHub 工作流程适用：
 fork → 功能分支 → 拉取请求。
 
-
 ## 许可证
 
+根据 MIT 许可证分发。有关更多信息，请参见 `LICENSE`。
+
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=shield&issueType=license)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_shield&issueType=license)
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=shield&issueType=security)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_shield&issueType=security)
 
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_large)
-
-根据 MIT 许可证分发。有关更多信息，请参见 `LICENSE`。
diff --git a/README.md b/README.md
index e1876ee..6d0eac0 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Drop*O*ut
 
+English | [中文](README.CN.md)
+
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=small)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_small)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit)](https://github.com/pre-commit/pre-commit)
 [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/HsiangNianian/DropOut/main.svg)](https://results.pre-commit.ci/latest/github/HsiangNianian/DropOut/main)
@@ -56,7 +58,7 @@ This launcher is built for players who value control, transparency, and long-ter
 
 ## Roadmap
 
-Check our full roadmap at: https://roadmap.sh/r/minecraft-launcher-dev
+Check our full roadmap at: <https://roadmap.sh/r/minecraft-launcher-dev>
 
 - [X] **Account Persistence** — Save login state between sessions
 - [X] **Token Refresh** — Auto-refresh expired Microsoft tokens
@@ -100,6 +102,7 @@ Download the latest release for your platform from the [Releases](https://github
    git clone https://github.com/HsiangNianian/DropOut.git
    cd DropOut
    ```
+
 2. **Install Frontend Dependencies**
 
    ```bash
@@ -107,12 +110,14 @@ Download the latest release for your platform from the [Releases](https://github
    pnpm install
    cd ..
    ```
+
 3. **Run in Development Mode**
 
    ```bash
    # This will start the frontend server and the Tauri app window
    cargo tauri dev
    ```
+
 4. **Build Release Version**
 
    ```bash
@@ -125,6 +130,7 @@ Download the latest release for your platform from the [Releases](https://github
 
 DropOut is built with long-term maintainability in mind.
 Contributions are welcome, especially in these areas:
+
 - Instance system design
 - Mod compatibility tooling
 - UI/UX improvements
@@ -133,12 +139,11 @@ Contributions are welcome, especially in these areas:
 Standard GitHub workflow applies:
 fork → feature branch → pull request.
 
-
 ## License
 
+Distributed under the MIT License. See `LICENSE` for more information.
+
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=shield&issueType=license)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_shield&issueType=license)
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=shield&issueType=security)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_shield&issueType=security)
 
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2FHsiangNianian%2FDropOut?ref=badge_large)
-
-Distributed under the MIT License. See `LICENSE` for more information.
diff --git a/packages/docs/README.md b/packages/docs/README.md
index 63b9290..f4e7563 100644
--- a/packages/docs/README.md
+++ b/packages/docs/README.md
@@ -5,6 +5,7 @@ This is the official documentation site for DropOut Minecraft Launcher, built wi
 ## Overview
 
 The documentation covers:
+
 - **Getting Started**: Installation and first-time setup
 - **Features**: Detailed guides for all launcher features
 - **Architecture**: Technical design and implementation details
@@ -14,6 +15,7 @@ The documentation covers:
 ### Multi-language Support
 
 The documentation is available in:
+
 - **English** (default) - `content/docs/en/`
 - **简体中文** (Simplified Chinese) - `content/docs/zh/`
 
@@ -68,7 +70,7 @@ pnpm format
 
 ## Project Structure
 
-```
+```bash
 packages/docs/
 ├── content/
 │   └── docs/              # Documentation content (MDX)
@@ -97,6 +99,7 @@ packages/docs/
 ### Structure
 
 Documentation is organized by locale:
+
 - English: `content/docs/en/`
 - Chinese: `content/docs/zh/`
 
@@ -105,6 +108,7 @@ Each locale has the same structure with translated content.
 ### Configuration
 
 i18n is configured in:
+
 - `source.config.ts`: Enables i18n support
 - `app/lib/source.ts`: Defines available languages and default
 
@@ -160,6 +164,7 @@ Fumadocs provides several components:
 ### Translation Guidelines
 
 When translating content:
+
 - Keep all code blocks in English
 - Translate frontmatter (title, description)
 - Keep technical terms (Tauri, Rust, Svelte, etc.) in English