chore: upstream cigar

[flying-sheep]

TODO: why are we rolling our own CigarOp instead of using noodles::sam::alignment::record::cigar::Op?

The only difference seems to be that that one has a Pad variant that we don’t have.

[Psy-Fer]

Oh yea so funny story.
Claude absolutely has no idea how to deal with cigar strings and messed this up so many times, that I wrote a quick version myself to get it on track. Forgot to go back and fix it up. 😅

[flying-sheep]

So you’re saying that we should get rid of CigarOp and use the upstream version?

[Psy-Fer]

I'm saying we should fix it.

[flying-sheep]

Is that a yes? Otherwise I don’t know what “fix” means, as I don’t know of anything that’s broken, just duplicate code that we can eliminate.