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/CustomField.php

@@ -62,9 +62,9 @@ class CustomField
     #[Groups(['composant:read', 'piece:read', 'product:read', 'machine:read'])]
     private int $orderIndex = 0;
 
-    #[ORM\ManyToOne(targetEntity: TypeMachine::class, inversedBy: 'customFields')]
-    #[ORM\JoinColumn(name: 'typeMachineId', referencedColumnName: 'id', nullable: true, onDelete: 'CASCADE')]
-    private ?TypeMachine $typeMachine = null;
+    #[ORM\ManyToOne(targetEntity: Machine::class, inversedBy: 'customFields')]
+    #[ORM\JoinColumn(name: 'machineId', referencedColumnName: 'id', nullable: true, onDelete: 'CASCADE')]
+    private ?Machine $machine = null;
 
     #[ORM\ManyToOne(targetEntity: ModelType::class, inversedBy: 'customFields')]
     #[ORM\JoinColumn(name: 'typeComposantId', referencedColumnName: 'id', nullable: true, onDelete: 'CASCADE')]
@@ -197,14 +197,14 @@ class CustomField
         return $this;
     }
 
-    public function getTypeMachine(): ?TypeMachine
+    public function getMachine(): ?Machine
     {
-        return $this->typeMachine;
+        return $this->machine;
     }
 
-    public function setTypeMachine(?TypeMachine $typeMachine): static
+    public function setMachine(?Machine $machine): static
     {
-        $this->typeMachine = $typeMachine;
+        $this->machine = $machine;
 
         return $this;
     }