Added count query

src/cpl_query/_query/count_query.py

@@ -0,0 +1,15 @@
+from collections import Callable
+
+from cpl_query._query.where_query import where_query
+from cpl_query.exceptions import ArgumentNoneException, ExceptionArgument
+from cpl_query.extension.iterable_abc import IterableABC
+
+
+def count_query(_list: IterableABC, _func: Callable = None) -> int:
+    if _list is None:
+        raise ArgumentNoneException(ExceptionArgument.list)
+
+    if _func is None:
+        return len(_list)
+
+    return len(where_query(_list, _func))