refactor(machines) : remove TypeMachine skeleton system, simplify machine creation

- Remove TypeEdit*, TypeInfoDisplay, MachineSkeletonSummary, MachineCreatePreview components
- Remove machine-skeleton pages and type pages
- Remove useMachineTypesApi, useMachineSkeletonEditor, useMachineCreateSelections composables
- Add AddEntityToMachineModal for direct entity linking
- Update machine detail/create pages for direct custom fields
- Fix SearchSelect, category display, and ipartial search filters

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/shared/apiRelations.ts

@@ -4,7 +4,6 @@ export const RELATION_ID_MAP: Record<string, { key: string; path: string }> = {
   composantId: { key: 'composant', path: 'composants' },
   pieceId: { key: 'piece', path: 'pieces' },
   productId: { key: 'product', path: 'products' },
-  typeMachineId: { key: 'typeMachine', path: 'type_machines' },
   typeComposantId: { key: 'typeComposant', path: 'model_types' },
   typePieceId: { key: 'typePiece', path: 'model_types' },
   typeProductId: { key: 'typeProduct', path: 'model_types' },