pls add wr.s3.to_pickle

[b-y-f]

Is your feature request related to a problem? Please describe.

Describe the solution you'd like A clear and concise description of what you are expecting.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

P.S. Please do not attach files as it's considered a security risk. Add code snippets directly in the message body as much as possible.

[malachi-constant]

Thanks @b-y-f for opening. I think this can be considered for the future roadmap. I'll add to our backlog for now.