feat: Intégration du backend NestJS depuis YNOV

- Framework: NestJS avec TypeORM
- Authentification: JWT (access + refresh tokens)
- Gestion utilisateurs: CRUD complet avec validation
- Routes: auth, users, parents, assistantes maternelles
- Dockerfile pour conteneurisation

backend/tsconfig.json

@@ -1,28 +1,26 @@
 {
   "compilerOptions": {
-    "target": "es2018",
-    "module": "commonjs",
-    "lib": ["es2018", "esnext.asynciterable"],
-    "skipLibCheck": true,
-    "sourceMap": true,
-    "outDir": "./dist",
-    "moduleResolution": "node",
-    "removeComments": true,
-    "noImplicitAny": true,
-    "strictNullChecks": true,
-    "strictFunctionTypes": true,
-    "noImplicitThis": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noImplicitReturns": true,
-    "noFallthroughCasesInSwitch": true,
-    "allowSyntheticDefaultImports": true,
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
+    "resolvePackageJsonExports": true,
     "esModuleInterop": true,
+    "isolatedModules": true,
+    "declaration": true,
+    "removeComments": true,
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
-    "resolveJsonModule": true,
-    "baseUrl": "."
-  },
-  "exclude": ["node_modules"],
-  "include": ["./src/**/*.ts"]
-} 
+    "allowSyntheticDefaultImports": true,
+    "target": "ES2023",
+    "sourceMap": true,
+    "outDir": "./dist",
+    "baseUrl": "./",
+    "incremental": true,
+    "skipLibCheck": true,
+    "strictNullChecks": true,
+    "forceConsistentCasingInFileNames": true,
+    "noImplicitAny": false,
+    "strictBindCallApply": false,
+    "noFallthroughCasesInSwitch": false,
+    "typeRoots": ["./node_modules/@types", "./src/types"]
+  }
+}