feat: delay dandischema.models import in dandi/cli/cmd_ls.py

Author: candleindark

dandi/cli/cmd_ls.py

@@ -3,7 +3,6 @@
 import os.path as op
 
 import click
-from dandischema import models
 
 from .base import devel_option, lgr, map_to_click_exceptions
 from .formatter import JSONFormatter, JSONLinesFormatter, PYOUTFormatter, YAMLFormatter
@@ -92,6 +91,8 @@ def ls(
 ):
     """List .nwb files and dandisets metadata."""
 
+    from dandischema import models
+
     # TODO: more logical ordering in case of fields = None
     common_fields = ("path", "size")
     if schema is not None: