API: make the query inputs positional only

This way implementers can pick a shorter name than "coord_transform".

Author: tacaswell

data_prototype/containers.py

@@ -34,6 +34,7 @@ class Desc:
 class DataContainer(Protocol):
     def query(
         self,
+        /,
         # TODO 3D?!!
         coord_transform: _MatplotlibTransform,
         size: Tuple[int, int],