Add Jsonable interface to Listener class

Implement the Jsonable interface in the Listener class to support JSON serialization. Added explicit return types to methods and annotated the toJson method with the Override attribute for better clarity and functionality.

Author: Pavlusha311245

src/Config/Listener.php

@@ -7,16 +7,18 @@
     ListenerPass,
     Tls
 };
+use Override;
 use UnitPhpSdk\Builders\EndpointBuilder;
 use UnitPhpSdk\Contracts\Arrayable;
+use UnitPhpSdk\Contracts\Jsonable;
 use UnitPhpSdk\Contracts\Uploadable;
 use UnitPhpSdk\Exceptions\UnitException;
 use UnitPhpSdk\Traits\CanUpload;
 
 /**
  * This class presents "listeners" section from config
  */
-class Listener implements Uploadable, Arrayable
+class Listener implements Uploadable, Arrayable, Jsonable
 {
     use CanUpload;
 
@@ -26,6 +28,8 @@ class Listener implements Uploadable, Arrayable
     private ListenerPass $pass;
 
     /**
+     *
+     *
      * @var int
      */
     private int $port;
@@ -231,21 +235,22 @@ public function setForwarded(?Forwarded $forwarded): void
     /**
      * Return Listener as JSON
      *
-     * @return string|false
+     * @param int $options
+     * @return string
      */
-    public function toJson(): string|false
+    #[Override] public function toJson(int $options = 0): string
     {
-        return json_encode($this->toArray());
+        return json_encode($this->toArray(), $options);
     }
 
-    public function toUnitArray()
+    public function toUnitArray(): array
     {
         return [
             $this->getListener() => $this->toArray()
         ];
     }
 
-    public function getTarget()
+    public function getTarget(): ListenerPass
     {
         return $this->getPass();
     }