feat: initialiser le projet CVP (Next.js 14 + FastAPI + PostgreSQL)

- Frontend : Next.js 14 App Router, TypeScript strict, Tailwind 3, shadcn/ui, next-intl (fr/en)
- Backend : FastAPI, SQLAlchemy 2 async, Alembic, Pydantic 2, Python 3.11
- Infrastructure : Docker Compose (PostgreSQL 16 + Ollama)
- Tooling : ESLint + Prettier (frontend), Ruff (backend), pytest
- Structure complète des dossiers avec pages et routers placeholder

backend/requirements.txt

@@ -0,0 +1,21 @@
+# Core
+fastapi==0.115.12
+uvicorn[standard]==0.34.2
+sqlalchemy[asyncio]==2.0.41
+asyncpg==0.30.0
+psycopg2-binary==2.9.11
+alembic==1.15.2
+pydantic==2.11.3
+pydantic-settings==2.9.1
+python-dotenv==1.1.0
+httpx==0.28.1
+apscheduler==3.11.0
+# weasyprint==65.1  # skipped: requires system libs (libpango, libcairo, etc.)
+python-docx==1.1.2
+ollama==0.4.8
+
+# Dev
+pytest==8.3.5
+pytest-asyncio==0.25.3
+pytest-cov==6.1.1
+ruff==0.11.8