Fix iterator for python 3.13 (was already non-compliant before)

src/videoag_common/miscellaneous/json.py

@@ -118,7 +118,7 @@ class CJsonObject(CJsonValue):
         return self.get(key).as_string(max_length, min_length)
 
 
-class _ArrayIterator:
+class _ArrayIterator(Iterable[CJsonValue]):
     
     def __init__(self, array: "CJsonArray"):
         super().__init__()
@@ -132,6 +132,9 @@ class _ArrayIterator:
         self._i += 1
         return ele
     
+    def __iter__(self):
+        return self
+
 
 class CJsonArray(CJsonValue, Iterable[CJsonValue]):