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, 4 insertions, 4 deletions

diff --git a/packages/docs/app/routes/docs.tsx b/packages/docs/app/routes/docs.tsx
index 5154d27..5090ccf 100644
--- a/packages/docs/app/routes/docs.tsx
+++ b/packages/docs/app/routes/docs.tsx
@@ -6,11 +6,11 @@ import { i18n } from '@/lib/i18n';
 export function loader({ params }: Route.LoaderArgs) {
   const lang = params.lang as string | undefined;
   
-  // 如果没有语言参数或是默认语言，重定向到 /docs/getting-started
+  // 如果没有语言参数或是默认语言，重定向到 /docs/manual/getting-started
   if (!lang || lang === i18n.defaultLanguage) {
-    return redirect('/docs/getting-started');
+    return redirect('/docs/manual/getting-started');
   }
   
-  // 其他语言重定向到 /:lang/docs/getting-started
-  return redirect(`/${lang}/docs/getting-started`);
+  // 其他语言重定向到 /:lang/docs/manual/getting-started
+  return redirect(`/${lang}/docs/manual/getting-started`);
 }