Description of the desired feature:

Right now the padding process is done externally before passing it to the grid transformation
padding -> hm.filter -> unpadding
I'm thinking to put the padding and unpadding inside the transformation, so we can use one-line code to do the filter
where paddling and unpadding are handled inside the transformation.

Probably we can also work on different type of padding method, for example Fedi, 2012. But I guess this will be better to implement on the xrft side?
What do you guys think?

Are you willing to help implement and maintain this feature?
Happy to implement this, but also love to see contributors to tackle this one