Decide how to integrate PEP 723 – inline script metadata

[hollandjg]

https://packaging.python.org/en/latest/specifications/inline-script-metadata

Thanks to @henryiii for the heads-up on this.

[hollandjg]

I don't think we're going to be able to fit this content in, and it's not clear what our recommendations would be. I think we should skip this for this year. I'll leave the issue open for next time.