feat: Setup projet Classeo avec infrastructure Docker et architecture DDD

Configure l'environnement de développement complet avec Docker Compose,
structure DDD 4 Bounded Contexts, et pipeline CI/CD GitHub Actions.

Corrections compatibilité CI:
- Symfony 8 nécessite monolog-bundle ^4.0 (la v3.x ne supporte que jusqu'à Symfony 7)
- ESLint v9 nécessite flat config (eslint.config.js) - le format .eslintrc.cjs est obsolète

README.md

@@ -0,0 +1,140 @@
+# Classeo
+
+Application de gestion scolaire moderne - Backend Symfony 8 + Frontend SvelteKit 2.
+
+## Quick Start
+
+### Prerequis
+
+- Docker Desktop 24+ avec Docker Compose 2.20+
+- Git
+
+### Lancement
+
+```bash
+# Cloner le repo
+git clone https://github.com/ClasseoEdu/classeo.git
+cd classeo
+
+# Lancer tous les services
+docker compose up -d
+
+# Verifier le statut
+docker compose ps
+```
+
+### URLs
+
+| Service | URL | Description |
+|---------|-----|-------------|
+| Frontend | http://localhost:5174 | Application SvelteKit |
+| Backend API | http://localhost:18000/api | API REST (API Platform) |
+| API Docs | http://localhost:18000/api/docs | Documentation OpenAPI |
+| RabbitMQ | http://localhost:15672 | Admin (guest/guest) |
+| Meilisearch | http://localhost:7700 | Dashboard recherche |
+| Mailpit | http://localhost:8025 | Emails de test |
+| Mercure | http://localhost:3000/.well-known/mercure | SSE Hub |
+
+## Stack Technique
+
+### Backend
+
+- **PHP 8.5** avec property hooks et asymmetric visibility
+- **Symfony 8.0** - Framework DDD-friendly
+- **API Platform 4.x** - API REST auto-generee
+- **Doctrine ORM 3.x** - Persistence avec mappings separes
+- **PHPStan level 9** - Analyse statique stricte
+
+### Frontend
+
+- **SvelteKit 2.x** - SSR, routing, PWA
+- **Svelte 5** - Runes (`$state`, `$derived`, `$effect`)
+- **TypeScript strict** - Typage fort
+- **TanStack Query 5** - Server state management
+- **Tailwind CSS 3** - Utility-first CSS
+
+### Infrastructure
+
+- **PostgreSQL 18.1** - Base de donnees
+- **Redis 7.4** - Cache + Sessions
+- **RabbitMQ 4.2** - Message queue
+- **Mercure** - Real-time SSE
+- **Meilisearch 1.12** - Full-text search
+- **Mailpit** - Email testing
+
+## Architecture
+
+### Bounded Contexts
+
+```
+backend/src/
+├── Administration/  # Gestion etablissement, utilisateurs
+├── Scolarite/       # Notes, classes, emploi du temps
+├── VieScolaire/     # Absences, retards, sanctions
+├── Communication/   # Messages, notifications
+└── Shared/          # Kernel partage (EntityId, DomainEvent, etc.)
+```
+
+### Structure DDD
+
+Chaque Bounded Context suit la meme structure :
+
+```
+{BC}/
+├── Domain/           # Pure PHP - ZERO dependance framework
+│   ├── Model/        # Aggregates, Entities, Value Objects
+│   ├── Event/        # Domain Events
+│   ├── Repository/   # Interfaces repository
+│   └── Service/      # Domain Services
+├── Application/      # Use cases
+│   ├── Command/      # Write operations
+│   ├── Query/        # Read operations
+│   └── EventHandler/ # Domain event handlers
+└── Infrastructure/   # Implementations framework
+    ├── Persistence/  # Doctrine repositories
+    ├── Api/          # API Platform resources
+    └── Messaging/    # RabbitMQ handlers
+```
+
+## Developpement
+
+### Commandes utiles
+
+```bash
+# Backend
+docker compose exec php composer phpstan      # Analyse statique
+docker compose exec php composer test         # Tests PHPUnit
+docker compose exec php composer cs-fix       # Correction code style
+
+# Frontend
+docker compose exec frontend pnpm run lint    # ESLint
+docker compose exec frontend pnpm run check   # TypeScript check
+docker compose exec frontend pnpm run test    # Vitest
+docker compose exec frontend pnpm run test:e2e # Playwright
+```
+
+### Makefile (raccourcis)
+
+```bash
+make up       # docker compose up -d
+make down     # docker compose down
+make logs     # docker compose logs -f
+make test     # Run all tests
+make lint     # Run all linters
+```
+
+## Tests
+
+- **PHPUnit** - Tests unitaires et integration backend
+- **Vitest** - Tests unitaires frontend
+- **Playwright** - Tests E2E
+
+## Documentation
+
+- [Architecture Decision Records](./docs/adr/)
+- [Contributing Guide](./CONTRIBUTING.md)
+- [API Documentation](http://localhost:8000/api/docs)
+
+## Licence
+
+Proprietary - ClasseoEdu