Changed model to be jsonserialiazable and it's factory into repository

Added model, create and required/optional to repository

src/Concept/Model.php

@@ -1,12 +1,13 @@
 <?php
 namespace ProVM\Concept;
 
-use ProVM\Concept\Model\Factory;
+use JsonSerializable;
+use ProVM\Concept\Model\Repository;
 
-interface Model
+interface Model extends JsonSerializable
 {
-    public function setFactory(Factory $factory): Model;
-    public function getFactory(): Factory;
+    public function setRepository(Repository $factory): Model;
+    public function getRepository(): Repository;
     public function setId(int $id): Model;
     public function getId(): int;
     public function setNew(): Model;