Add the possibility to create the mask in extract_dataset

[juliettelavoie]

Addressing a Problem?

Now, the mask argument takes an already formed mask.

I could be useful to have a way to create the mask and apply it.

Potential Solution

If mask is a dict, pass it as argument to the xs.create_mask to create the mask and then apply it to the data.

ex. mask_args = {
"variable": "sftlf",
"where_operator": ">=",
"where_threshold": 95,
"mask_nans": True,
}

The call to xs.create_mask needs the data. It could be extracted from the catalog similarly to how the mask is extracted now.

Additional context

No response

Contribution

• I would be willing/able to open a Pull Request to contribute this feature.

[juliettelavoie]

Creep_fill could also be added to create_mask to allow for the creation of more complex masks.