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/components/SiteFooter.tsx

@@ -0,0 +1,20 @@
+import { Link } from 'react-router-dom';
+import { REPO } from '../links';
+
+export function SiteFooter() {
+  return (
+    <footer className="footer">
+      <div className="wrap footer-inner">
+        <p style={{ margin: 0 }}>© {new Date().getFullYear()} LexAI · MIT</p>
+        <div style={{ display: 'flex', gap: '1rem', flexWrap: 'wrap' }}>
+          <Link to="/docs">Docs</Link>
+          <Link to="/contribute">Contribute</Link>
+          <Link to="/community">Community</Link>
+          <a href={REPO} target="_blank" rel="noreferrer">
+            Source
+          </a>
+        </div>
+      </div>
+    </footer>
+  );
+}