fix: missing property title in the service api base implementation

Author: yaza-putu

src/Commands/stubs/service-api.stub

@@ -14,9 +14,9 @@ class {serviceName} extends ServiceApi implements {serviceInterface}{
      protected string $title = "";
      /**
      * uncomment this to override the default message
-     * protected $create_message = "";
-     * protected $update_message = "";
-     * protected $delete_message = "";
+     * protected string $create_message = "";
+     * protected string $update_message = "";
+     * protected string $delete_message = "";
      */
 
      /**

src/ServiceApi.php

@@ -9,10 +9,10 @@ class ServiceApi implements BaseService
 {
     use ResultService;
 
-    protected $title = "";
-    protected $create_message = "created successfully";
-    protected $update_message = "updated successfully";
-    protected $delete_message = "deleted successfully";
+    protected string $title = "";
+    protected string $create_message = "created successfully";
+    protected string $update_message = "updated successfully";
+    protected string $delete_message = "deleted successfully";
 
 
     /**