[Feature] Allow setting of run_name in sopa explorer write

[pakiessling]

run_name in the .xenium controls how samples appear in the xenium explorer
Right now image_key is used here which leads to all Xenium samples appearing as morphology_focus in the Xenium explorer.

I think it would be nice to let the user specify a sample name, which would make it less confusing to work with multiple samples.

Let me know what you think, I could also try and do a PR :)

[quentinblampey]

Hi @pakiessling, this is indeed interesting for Xenium data. Since it's a very minor change, I'll do it myself quickly now, and it will be available for sopa==2.0.0!

[pakiessling]

Cool thanks a lot!