chore(adventure-rental-app): strip down application and remove obsolete files

This commit performs a major cleanup of the `adventure-rental-app` by removing all existing components, pages, layouts, and project brief documents. The application is reduced to a minimal Vite shell.

- Deleted all authentication, chatbot, and dashboard components and pages.
- Removed outdated project brief and PRD markdown files.
- Updated Vite and `@vitejs/plugin-react` dependencies.

Additionally, the `framer-motion` dependency was added to the `bookoomoo-app`.

bookoomoo-app/public/hero-image.png

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="400" height="300" viewBox="0 0 400 300"><rect width="400" height="300" fill="#e0f2f1"/><text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle" font-family="sans-serif" font-size="24px" fill="#374151">Hero Image Placeholder</text></svg>