Support COMMENT on an INDEX

[olleolleolle]

I had a PR open to the old gem which supported reading comments from indexes and presenting them in the annotation.

I still want to have that functionality.

Old PR to port ctran/annotate_models#1006

Would you merge such a thing?

[drwl]

Hi @olleolleolle, I don't see why it couldn't be added. My ask would be to add another flag/option to make it an opt-in feature.

[drwl]

I am going through issues and prs and doing some tidying. Did you still want to take this on? @olleolleolle

[olleolleolle]

@drwl Yeah, it's a nice feature, and I want to build it out.