Add signer type differentiation for workflows

Added a method to determine if the signer is a 'person' or 'user'. Updated the signature template to handle both types accordingly, ensuring the correct entity type is displayed in workflow signatures.

src/Bundle/ChillMainBundle/Entity/Workflow/EntityWorkflowStepSignature.php

@@ -140,4 +140,16 @@ class EntityWorkflowStepSignature implements TrackCreationInterface, TrackUpdate
     {
         return EntityWorkflowSignatureStateEnum::SIGNED == $this->getState();
     }
+
+    /**
+     * @return 'person'|'user'
+     */
+    public function getSignerKind(): string
+    {
+        if ($this->personSigner instanceof Person) {
+            return 'person';
+        }
+
+        return 'user';
+    }
 }