create_regridding_dataset as a method of Grid

[ahuang11]

Cool, convenient package! I was looking at the examples, and I am wondering whether Grid could simply contain the create_regridding_dataset util as a method instead of separately importing since dataclasses can also hold methods:

from xarray_regrid import Grid, create_regridding_dataset

new_grid = Grid(
    north=90,
    east=90,
    south=0,
    west=0,
    resolution_lat=1,
    resolution_lon=1,
)
target_dataset = create_regridding_dataset(new_grid)

to

from xarray_regrid import Grid

target_dataset = Grid(
    north=90,
    east=90,
    south=0,
    west=0,
    resolution_lat=1,
    resolution_lon=1,
).to_dataset()

[BSchilperoort]

Good point! This would indeed be much more convenient.