docs: added project structure guide

Author: KayvanShah1

README.md

@@ -62,6 +62,10 @@ Built on a robust backend and a sleek React frontend, Taskaza offers both **trad
 * **Infra**: Docker, GitHub Actions CI/CD, Render/Railway deploy
 * **Testing**: Pytest (backend), Playwright (frontend)
 
+## Project Structure
+- `/backend` → FastAPI API (Task Management system; see its README for setup)
+- `/frontend` → Next.js app (landing page + dashboard UI)
+  - See [`/frontend/agents.md`](./frontend/agents.md) for details on AskBar + Agent integration
 
 ## Roadmap