feat: add Gitea configuration page and state management

- Implemented GiteaConfigPage for managing Gitea API settings.
- Created Zustand store for Gitea configuration with local storage persistence.
- Added validation schema for Gitea configuration using Zod.
- Established routes for Gitea configuration in the application.

src/routes/config/gitea.tsx

@@ -0,0 +1,9 @@
+import { createFileRoute } from '@tanstack/react-router'
+import App from '@/app/config/gitea/page'
+export const Route = createFileRoute('/config/gitea')({
+  component: RouteComponent,
+})
+
+function RouteComponent() {
+  return <App />
+}