add some top-level type exports

Author: d-v-b

src/zarr/types.py

@@ -1 +1,17 @@
 """Public type definitions and constants"""
+
+from zarr.core.types import (
+    ArrayMetadataJSON_V2,
+    ArrayMetadataJSON_V3,
+    GroupMetadataJSON_V2,
+    GroupMetadataJSON_V3,
+    ZarrFormat,
+)
+
+__all__ = [
+    "ArrayMetadataJSON_V2",
+    "ArrayMetadataJSON_V3",
+    "GroupMetadataJSON_V2",
+    "GroupMetadataJSON_V3",
+    "ZarrFormat",
+]