Add init files for modularization, generated using mkinit (now a dependency on dev)

src/pg_rad/dataloader/__init__.py

@@ -0,0 +1,8 @@
+# do not expose internal logger when running mkinit
+__ignore__ = ["logger"]
+
+from pg_rad.dataloader import dataloader
+
+from pg_rad.dataloader.dataloader import (load_data,)
+
+__all__ = ['dataloader', 'load_data']