enh: DataFrame.join_asof

[MarcoGorelli]

Is your feature request related to a problem?

Daft support in Narwhals

Describe the solution you'd like

There are many join types supported in Daft - is join_asof considered in-scope?

Describe alternatives you've considered

No response

Additional Context

No response

Would you like to implement a fix?

No

[kevinzwang]

Hi @MarcoGorelli , thanks for raising this up. Asof joins are not currently on our roadmap but we are aware of the feature gap here and would love to eventually have support for it.

If others in the community are also interested in this functionality, let us know, and we may bump up the priority if there's enough interest!

[universalmind303]

duplicate of #1400