Add suggested persons and third parties methods

Introduced getSuggestedPersons and getSuggestedThirdParties methods across various WorkflowHandlers. These methods integrate with ProvidePersonsAssociated and ProvideThirdPartiesAssociated services to fetch related entities, enhancing the workflow handling capabilities.

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

@@ -238,6 +238,16 @@ class WorkflowViewSendPublicControllerTest extends TestCase
             {
                 return 'content';
             }
+
+            public function getSuggestedPersons(EntityWorkflow $entityWorkflow): array
+            {
+                return [];
+            }
+
+            public function getSuggestedThirdParties(EntityWorkflow $entityWorkflow): array
+            {
+                return [];
+            }
         };
     }