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

frontend/src/lib/index.ts

@@ -0,0 +1,2 @@
+// place files you want to import through the `$lib` alias in this folder.
+export * from './types';

frontend/src/lib/types/api.ts

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+// API response types
+export interface ApiError {
+	code: string;
+	message: string;
+	violations?: Array<{
+		propertyPath: string;
+		message: string;
+	}>;
+}
+
+export interface PaginatedResponse<T> {
+	data: T[];
+	meta: {
+		total: number;
+		page: number;
+		itemsPerPage: number;
+		lastPage: number;
+	};
+}
+
+export interface HydraCollection<T> {
+	'@context': string;
+	'@id': string;
+	'@type': string;
+	'hydra:totalItems': number;
+	'hydra:member': T[];
+	'hydra:view'?: {
+		'@id': string;
+		'@type': string;
+		'hydra:first'?: string;
+		'hydra:last'?: string;
+		'hydra:next'?: string;
+		'hydra:previous'?: string;
+	};
+}

frontend/src/lib/types/index.ts

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+export * from './shared';
+export * from './api';

frontend/src/lib/types/shared.ts

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+// Branded types for type safety
+export type TenantId = string & { readonly brand: unique symbol };
+export type UserId = string & { readonly brand: unique symbol };
+export type NoteId = string & { readonly brand: unique symbol };
+export type ClasseId = string & { readonly brand: unique symbol };
+export type EleveId = string & { readonly brand: unique symbol };
+
+// Helper functions for branded types
+export function createTenantId(id: string): TenantId {
+	return id as TenantId;
+}
+
+export function createUserId(id: string): UserId {
+	return id as UserId;
+}
+
+export function createNoteId(id: string): NoteId {
+	return id as NoteId;
+}
+
+export function createClasseId(id: string): ClasseId {
+	return id as ClasseId;
+}
+
+export function createEleveId(id: string): EleveId {
+	return id as EleveId;
+}