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.

.gitea/workflows/ci-website.yml

@@ -0,0 +1,52 @@
+name: CI — Website
+
+on:
+  push:
+    branches: [main, develop]
+    paths:
+      - 'packages/website/**'
+      - '.gitea/workflows/ci-website.yml'
+  pull_request:
+    branches: [main]
+    paths:
+      - 'packages/website/**'
+      - '.gitea/workflows/ci-website.yml'
+
+jobs:
+  website:
+    name: Website — typecheck, build
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    container:
+      image: node:22-bookworm
+
+    steps:
+      - name: Install system deps
+        run: apt-get update -qq && apt-get install -y git ca-certificates -qq
+
+      - name: Clone repository
+        run: |
+          git clone ${{ gitea.server_url }}/${{ gitea.repository }}.git /tmp/lexai
+          cd /tmp/lexai
+          if [ "${{ gitea.event_name }}" = "pull_request" ]; then
+            git fetch origin pull/${{ gitea.event.pull_request.number }}/head:pr
+            git checkout pr
+          else
+            git checkout ${{ gitea.sha }}
+          fi
+
+      - name: Install dependencies
+        run: npm ci --prefer-offline --no-audit --no-fund
+        working-directory: /tmp/lexai/packages/website
+
+      - name: Typecheck
+        run: npm run typecheck
+        working-directory: /tmp/lexai/packages/website
+
+      - name: Build
+        run: npm run build
+        working-directory: /tmp/lexai/packages/website
+
+      - name: Verify output
+        run: ls -la dist/
+        working-directory: /tmp/lexai/packages/website