feat: complete monorepo structure with frontend and shared resources

- Add complete backend/ directory with full Django application
- Add frontend/ directory with Vite + TypeScript setup ready for Next.js
- Add comprehensive shared/ directory with:
  - Complete documentation and memory-bank archives
  - Media files and avatars (letters, park/ride images)
  - Deployment scripts and automation tools
  - Shared types and utilities
- Add architecture/ directory with migration guides
- Configure pnpm workspace for monorepo development
- Update .gitignore to exclude .django_tailwind_cli/ build artifacts
- Preserve all historical documentation in shared/docs/memory-bank/
- Set up proper structure for full-stack development with shared resources

backend/templates/accounts/turnstile_widget.html

@@ -0,0 +1,22 @@
+<script
+  src="https://challenges.cloudflare.com/turnstile/v0/api.js"
+  async
+  defer
+></script>
+<div class="turnstile">
+  <div
+    id="turnstile-widget"
+    class="cf-turnstile"
+    data-sitekey="{{ site_key }}"
+  ></div>
+</div>
+
+<script>
+  // Apply theme to the Turnstile widget based on the retrieved theme
+  document.addEventListener("DOMContentLoaded", function () {
+    const turnstileWidget = document.getElementById("turnstile-widget");
+    if (turnstileWidget) {
+      turnstileWidget.setAttribute("data-theme", theme);
+    }
+  });
+</script>