Restructure docs into manual/development and add implementation docs (#94)

## Summary by Sourcery

Restructure documentation into separate manual and development sections,
introduce detailed internal implementation docs for auth/Java/mod
loaders, and update site navigation, landing page links, and MDX tooling
(Mermaid, card styling) to match the new structure and tech stack.

Enhancements:
- Enable Mermaid rendering support in the docs app and add a reusable
Mermaid React component.
- Refine Docs page rendering by customizing Card styling and removing
redundant in-page titles/descriptions rendered by the layout.
- Align docs source configuration and routing comments with the new
manual-based default paths.

Documentation:
- Split user-facing docs under a new manual section and move contributor
content into a dedicated development section for both English and
Chinese.
- Add comprehensive internal implementation documentation covering
authentication, Java management, mod loader/version merging, event bus,
and architecture patterns in both English and Chinese.
- Update existing feature docs (mod loaders, Java, authentication) and
getting-started/troubleshooting pages to be more conceptual, pointing to
implementation docs for technical details.
- Refresh architecture docs to reflect the React/Zustand frontend stack
and add Mermaid-based architecture diagrams.
- Adjust navigation labels, home-page CTAs, and doc links to target the
new manual/development structure and routes.

---------

Co-authored-by: 简律纯 <i@jyunko.cn>

1 files changed, 0 insertions, 95 deletions

diff --git a/packages/docs/content/en/index.mdx b/packages/docs/content/en/index.mdx
deleted file mode 100644
index 9dee19f..0000000
--- a/packages/docs/content/en/index.mdx
+++ /dev/null
@@ -1,95 +0,0 @@
----
-title: Welcome to DropOut
-description: Modern, reproducible, and developer-grade Minecraft launcher
----
-
-# Welcome to DropOut
-
-DropOut is a modern Minecraft launcher built with Tauri v2 and Rust, designed for players who value control, transparency, and long-term stability.
-
-<div style={{ textAlign: 'center', margin: '2rem 0' }}>
-  <img src="/image.png" alt="DropOut Launcher" style={{ maxWidth: '700px', borderRadius: '8px' }} />
-</div>
-
-## Why DropOut?
-
-Most Minecraft launchers focus on getting you into the game. DropOut focuses on keeping your game **stable**, **debuggable**, and **reproducible**.
-
-- Your instance worked yesterday but broke today? → **DropOut makes it traceable.**
-- Sharing a modpack means zipping gigabytes? → **DropOut shares exact dependency manifests.**
-- Java, loader, mods, configs drift out of sync? → **DropOut locks them together.**
-
-This launcher is built for players who value control, transparency, and long-term stability.
-
-## Quick Links
-
-<Cards>
-  <Card 
-    title="Getting Started" 
-    href="getting-started"
-    description="Install and set up DropOut in minutes"
-  />
-  <Card 
-    title="Features" 
-    href="features"
-    description="Explore all the capabilities of DropOut"
-  />
-  <Card 
-    title="Architecture" 
-    href="architecture"
-    description="Learn about the technical design"
-  />
-  <Card 
-    title="Development" 
-    href="development"
-    description="Build and contribute to DropOut"
-  />
-</Cards>
-
-## Key Features
-
-### High Performance
-Built with Rust and Tauri for minimal resource usage and fast startup times.
-
-### Modern UI
-Clean, distraction-free interface with Svelte 5, Tailwind CSS 4, and particle effects.
-
-### Secure Authentication
-Microsoft OAuth 2.0 with device code flow and offline authentication support.
-
-### Mod Loader Support
-Built-in installation for Fabric and Forge with automatic version management.
-
-### Java Management
-Automatic detection of installed Java versions and integrated downloader for Adoptium JDK/JRE.
-
-### Instance System
-Isolated game environments with independent configurations, mods, and saves.
-
-### AI Assistant
-Built-in AI helper for troubleshooting, configuration, and guidance.
-
-### Fast Downloads
-Concurrent asset and library downloads with resume support and progress tracking.
-
-## Technology Stack
-
-- **Backend**: Rust with Tauri v2
-- **Frontend**: Svelte 5 with runes
-- **Styling**: Tailwind CSS 4
-- **Build Tool**: Vite with Rolldown
-- **Documentation**: Fumadocs with React Router
-
-## Community
-
-- **GitHub**: [HydroRoll-Team/DropOut](https://github.com/HydroRoll-Team/DropOut)
-- **Issues**: [Report bugs](https://github.com/HydroRoll-Team/DropOut/issues)
-- **Roadmap**: [View development roadmap](https://roadmap.sh/r/minecraft-launcher-dev)
-
-## License
-
-DropOut is open source software licensed under the MIT License.
-
----
-
-Ready to get started? Check out the [Getting Started Guide](getting-started)!