Add fqdn typings

typings/fqdn/__init__.pyi

@@ -0,0 +1,7 @@
+from typing import Any
+
+
+class FQDN:
+    def __init__(self, fqdn: Any, *nothing: list[Any], **kwags: dict[Any, Any]) -> None: ...
+    @property
+    def is_valid(self) -> bool: ...