Add access controls and permissions for signature steps

Implemented a Voter to enforce permissions on signature steps, ensuring only authorized users can sign steps. Updated relevant controllers and templates to reflect these permissions, and added corresponding tests to validate the changes.

src/Bundle/ChillMainBundle/Templating/Entity/ChillEntityRenderManager.php

@@ -18,8 +18,8 @@ final readonly class ChillEntityRenderManager implements ChillEntityRenderManage
     public function __construct(/**
      * @var iterable<ChillEntityRenderInterface>
      */
-    private iterable $renders)
-    {
+        private iterable $renders,
+    ) {
         $this->defaultRender = new ChillEntityRender();
     }