docs: add chinese readme and docs website (#76)

## Summary by Sourcery

Add a new documentation site package and a Chinese README to improve
project documentation and accessibility.

New Features:
- Introduce a dedicated @dropout/docs React Router application powered
by Fumadocs for hosting the project documentation.

Documentation:
- Add a Chinese README file providing an overview, installation, build
instructions, and contribution guidelines for Chinese-speaking users.
- Set up initial docs content, navigation, and metadata within the new
docs site, including example pages and search endpoint configuration.

2 files changed, 16 insertions, 0 deletions

diff --git a/packages/docs/app/lib/layout.shared.tsx b/packages/docs/app/lib/layout.shared.tsx
new file mode 100644
index 0000000..af2b6f0
--- /dev/null
+++ b/packages/docs/app/lib/layout.shared.tsx
@@ -0,0 +1,9 @@
+import type { BaseLayoutProps } from 'fumadocs-ui/layouts/shared';
+
+export function baseOptions(): BaseLayoutProps {
+  return {
+    nav: {
+      title: 'React Router',
+    },
+  };
+}
diff --git a/packages/docs/app/lib/source.ts b/packages/docs/app/lib/source.ts
new file mode 100644
index 0000000..97cf767
--- /dev/null
+++ b/packages/docs/app/lib/source.ts
@@ -0,0 +1,7 @@
+import { loader } from 'fumadocs-core/source';
+import { docs } from 'fumadocs-mdx:collections/server';
+
+export const source = loader({
+  source: docs.toFumadocsSource(),
+  baseUrl: '/docs',
+});