Moved the ApiCollectionInterface class

+ Move the ApiCollectionInterface class into a new "Collections/Interfaces/" folder

src/Collections/ApiItemCollection.php

@@ -2,7 +2,7 @@
 
 namespace Gitea\Collections;
 
-use Gitea\Collections\ApiCollectionInterface;
+use Gitea\Collections\Interfaces\ApiCollectionInterface;
 
 use \Countable;
 use \IteratorAggregate;

src/Collections/Interfaces/ApiCollectionInterface.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Gitea\Collections;
+namespace Gitea\Collections\Interfaces;
 
 use Gitea\Api\AbstractApi;