feat(#156): création dossier AM staff — API + wizard dashboard.

Squash depuis develop : POST /assistantes-maternelles/dossier (actif +
mail MDP), AmDossierWizard create/review, validations inscription.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/package.json

@@ -89,6 +89,9 @@
     "transform": {
       "^.+\\.(t|j)s$": "ts-jest"
     },
+    "moduleNameMapper": {
+      "^src/(.*)$": "<rootDir>/$1"
+    },
     "collectCoverageFrom": [
       "**/*.(t|j)s"
     ],