Move sgrid to utils

Author: VeckoTheGecko

src/parcels/_core/sgrid.py src/parcels/_core/utils/sgrid.pysrc/parcels/_core/sgrid.py renamed to src/parcels/_core/utils/sgrid.py

@@ -11,7 +11,7 @@
 import xarray.testing.strategies as xr_st
 from hypothesis import strategies as st
 
-from parcels._core import sgrid
+from parcels._core.utils import sgrid
 
 padding = st.sampled_from(sgrid.Padding)
 dimension_name = xr_st.names().filter(

tests/strategies/sgrid.py

@@ -4,7 +4,7 @@
 import xgcm
 from hypothesis import example, given
 
-from parcels._core import sgrid
+from parcels._core.utils import sgrid
 from tests.strategies import sgrid as sgrid_strategies