Rename signature templates by removing underscores

Standardized template names in WorkflowController and WorkflowAddSignatureController for better consistency. Updated references and renamed template files accordingly.

src/Bundle/ChillMainBundle/Controller/WorkflowAddSignatureController.php

@@ -71,7 +71,7 @@ final readonly class WorkflowAddSignatureController
 
         return new Response(
             $this->twig->render(
-                '@ChillMain/Workflow/_signature_sign.html.twig',
+                '@ChillMain/Workflow/signature_sign.html.twig',
                 ['signature' => $signatureClient]
             )
         );

src/Bundle/ChillMainBundle/Controller/WorkflowController.php

@@ -430,7 +430,7 @@ class WorkflowController extends AbstractController
         }
 
         return $this->render(
-            '@ChillMain/Workflow/_signature_metadata.html.twig',
+            '@ChillMain/Workflow/signature_metadata.html.twig',
             [
                 'metadata_form' => $metadataForm->createView(),
                 'person' => $signature->getSigner(),

src/Bundle/ChillMainBundle/Tests/Controller/WorkflowAddSignatureControllerTest.php

@@ -62,7 +62,7 @@ class WorkflowAddSignatureControllerTest extends TestCase
             ->willReturn([]);
 
         $twig = $this->createMock(Environment::class);
-        $twig->method('render')->with('@ChillMain/Workflow/_signature_sign.html.twig', $this->isType('array'))
+        $twig->method('render')->with('@ChillMain/Workflow/signature_sign.html.twig', $this->isType('array'))
             ->willReturn('ok');
 
         $urlGenerator = $this->createMock(UrlGeneratorInterface::class);