Implement signature cancellation feature

Added functionality to cancel signatures in workflow, including controller, view, and tests. Updated translations and adjusted templates to support and display cancellation actions.

src/Bundle/ChillMainBundle/Workflow/SignatureStepStateChanger.php

@@ -89,6 +89,13 @@ class SignatureStepStateChanger
         $this->logger->info(self::LOG_PREFIX.'Transition automatically applied', ['signatureId' => $signature->getId()]);
     }
 
+    public function markSignatureAsCanceled(EntityWorkflowStepSignature $signature): void
+    {
+        $signature
+            ->setState(EntityWorkflowSignatureStateEnum::CANCELED)
+            ->setStateDate($this->clock->now());
+    }
+
     private function getPreviousSender(EntityWorkflowStep $entityWorkflowStep): ?User
     {
         $stepsChained = $entityWorkflowStep->getEntityWorkflow()->getStepsChained();