refactor(api) : remove TypeMachine skeleton system, fix ModelType serialization

- Remove TypeMachine, TypeMachineComponentRequirement, TypeMachinePieceRequirement,
  TypeMachineProductRequirement entities and related repositories/state processor
- Replace MachineSkeletonController with MachineStructureController
- Link CustomField directly to Machine instead of TypeMachine
- Add migration to drop TypeMachine tables and migrate custom fields to machines
- Fix ModelType serialization: Annotation\Groups → Attribute\Groups (Symfony 8 compat)
  and add product:read, composant:read, piece:read groups for embedded category display
- Fix Profile: same Annotation → Attribute import
- Fix SearchFilter: partial → ipartial on Comment and Document
- Update frontend submodule (remove skeleton pages/components, simplify machine creation)

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

src/Entity/Comment.php

@@ -20,7 +20,7 @@ use Doctrine\ORM\Mapping as ORM;
 #[ORM\Table(name: 'comments')]
 #[ORM\Index(columns: ['entity_type', 'entity_id', 'status'], name: 'idx_comment_entity_status')]
 #[ORM\HasLifecycleCallbacks]
-#[ApiFilter(SearchFilter::class, properties: ['entityType' => 'exact', 'entityId' => 'exact', 'status' => 'exact', 'entityName' => 'partial'])]
+#[ApiFilter(SearchFilter::class, properties: ['entityType' => 'exact', 'entityId' => 'exact', 'status' => 'exact', 'entityName' => 'ipartial'])]
 #[ApiFilter(OrderFilter::class, properties: ['createdAt', 'authorName', 'status'])]
 #[ApiResource(
     operations: [