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.

CONTRIBUTING.md

@@ -51,6 +51,7 @@ Gitea Actions runs one workflow per package (path-filtered):
 | `.gitea/workflows/ci-chrome.yml` | `packages/chrome` (+ `src/lib`, `tests`) |
 | `.gitea/workflows/ci-vscode.yml` | `packages/vscode` (+ `src/lib`) |
 | `.gitea/workflows/ci-cli.yml` | `packages/cli` (+ `src/lib`) |
+| `.gitea/workflows/ci-website.yml` | `packages/website` |
 
 Deploy / preview / release workflows are not enabled yet.