feat: add Etat des lieux module (Intelligence & Personnalisation)

Features added:

• Full route structure under /dashboard/checkandgo/intelligence with 5 sub-pages: Personnalisation des Inspections, Modèle de Détection, Seuils de Confiance, Données d'Entraînement, Tableau de Bord Performance IA
• Navigation entry "Etat des lieux" with custom SVG icon added to the dashboard sidebar
• Form model builder (formModelView + formBuilder) with create/edit/delete support and hybrid localStorage/API storage fallback
• AI configuration views: model detection, confidence thresholds, training data management, and performance dashboard with MUI X Charts
• Custom breadcrumbs shared component
• Axios instance configured against the Etat des lieux API (NEXT_PUBLIC_ETAT_DES_LIEUX_API_URL) with localStorage fallback on CORS
• RBAC permission mappings temporarily disabled to allow all VSN users access during the testing phase
• Module color palette unified to VSN primary (#7365db)
• All pages aligned left (removed centering from content containers)

Files removed (cleanup):

• Unused components: InspectionList, formModelList, formStorage, inspectionStorage, mockData, docusignService
• Empty shared/sections placeholder files