feat: add website components and pages for LexAI

- Implemented SiteHeader and SiteFooter components for consistent navigation and footer across the website.
- Created CommunityPage and ContributePage to provide information on community involvement and contribution guidelines.
- Developed DocsPage to serve as the main documentation hub, detailing features and installation instructions.
- Added HomePage to introduce LexAI and its functionalities, highlighting key features and privacy aspects.
- Established links.ts for centralized management of external links used throughout the website.
- Configured main.tsx for application entry point with React Router for navigation.
- Introduced styles.css for consistent styling across the website.
- Set up TypeScript configuration files for improved type checking and development experience.
- Configured Vite for building and serving the website.

packages/website/src/App.tsx

@@ -0,0 +1,25 @@
+import { Navigate, Route, Routes } from 'react-router-dom';
+import { SiteHeader } from './components/SiteHeader';
+import { SiteFooter } from './components/SiteFooter';
+import { HomePage } from './pages/HomePage';
+import { DocsPage } from './pages/DocsPage';
+import { ContributePage } from './pages/ContributePage';
+import { CommunityPage } from './pages/CommunityPage';
+
+export default function App() {
+  return (
+    <div className="shell">
+      <SiteHeader />
+      <main>
+        <Routes>
+          <Route path="/" element={<HomePage />} />
+          <Route path="/docs" element={<DocsPage />} />
+          <Route path="/contribute" element={<ContributePage />} />
+          <Route path="/community" element={<CommunityPage />} />
+          <Route path="*" element={<Navigate to="/" replace />} />
+        </Routes>
+      </main>
+      <SiteFooter />
+    </div>
+  );
+}