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/pages/ContributePage.tsx

@@ -0,0 +1,88 @@
+import { REPO, REPO_CONDUCT, REPO_CONTRIBUTING } from '../links';
+
+export function ContributePage() {
+  return (
+    <div className="wrap page">
+      <article className="docs-content">
+        <h1>Contribute</h1>
+        <p className="intro">
+          LexAI is a monorepo: Chrome, VS Code, CLI, website, and a shared library. Please follow
+          the{' '}
+          <a href={REPO_CONDUCT} target="_blank" rel="noreferrer">
+            Code of Conduct
+          </a>
+          .
+        </p>
+
+        <section className="docs-block" id="ways">
+          <h2>Ways to help</h2>
+          <ul>
+            <li>Bug reports with reproduction steps</li>
+            <li>Documentation fixes</li>
+            <li>Small, focused pull requests (one concern per PR)</li>
+            <li>Design discussion when a change is large or security-sensitive</li>
+          </ul>
+        </section>
+
+        <section className="docs-block" id="setup">
+          <h2>Development setup</h2>
+          <p>Node.js 22+ and npm 11+.</p>
+          <pre className="mono">{`git clone https://git.juankibin.space/kibin/LexAI.git
+cd LexAI
+npm run install:all`}</pre>
+          <ul>
+            <li>
+              <code>npm run chrome:dev</code> / <code>chrome:test</code> /{' '}
+              <code>chrome:typecheck</code>
+            </li>
+            <li>
+              <code>npm run vscode:build</code> / <code>vscode:typecheck</code>
+            </li>
+            <li>
+              <code>npm run cli:build</code> / <code>cli:typecheck</code>
+            </li>
+            <li>
+              <code>npm run website:dev</code>
+            </li>
+          </ul>
+          <p>
+            Shared code lives in <code>src/lib/</code>. Do not import <code>@lib/crypto</code> or{' '}
+            <code>@lib/messaging</code> from VS Code or CLI.
+          </p>
+        </section>
+
+        <section className="docs-block" id="prs">
+          <h2>Pull requests</h2>
+          <ol>
+            <li>
+              Branch from <code>main</code> or <code>develop</code>.
+            </li>
+            <li>Keep the change scoped. Update docs when behavior changes.</li>
+            <li>Run the checks for the package you touched.</li>
+            <li>
+              Use the PR template in <code>.gitea/PULL_REQUEST_TEMPLATE.md</code>.
+            </li>
+            <li>Never commit API keys, tokens, or personal data.</li>
+          </ol>
+        </section>
+
+        <section className="docs-block" id="security">
+          <h2>Security</h2>
+          <p>
+            If you find a vulnerability around API-key handling or data exfiltration, do not open a
+            public issue with exploit details. Contact the maintainer privately (repository owner /
+            Chrome Web Store listing).
+          </p>
+          <div className="docs-meta">
+            <a className="btn btn-primary" href={REPO} target="_blank" rel="noreferrer">
+              Open the repository
+            </a>
+            <a className="btn btn-ghost" href={REPO_CONTRIBUTING} target="_blank" rel="noreferrer">
+              CONTRIBUTING.md
+            </a>
+          </div>
+        </section>
+      </article>
+    </div>
+  );
+}