feat(website): Split mutations by gene (for aa) and segment (for nucs), fix "show more" bug

[anna-parker]

resolves #1796, resolves #1620

preview URL: https://feat-split-mutations-by-s.loculus.org/

Summary

• This PR splits mutations up by segments (currently the only segments we have are genes but in future this can be used for segmented genomes) to allow for easier viewing.
• It also removes the show more button for segments that have under MAX_INITIAL_NUMBER_BADGES and where the button is not required.
• It visually removes the segmentName from the start of the mutation badge object (as this is now clear from the title). However, the sequenceName is still in the mutationBadge component and when the mutations are copied the sequenceNames are still appended to the front of the mutation: i.e. GP:A83V GP:T263A... additionally, the page can be searched with appended sequenceName.

Screenshot

[corneliusroemer]

This is great!

I was wondering if you want to not include the gene/segment in the badges to make the more concise now that genes/segments are included in the title.

So not show VP35: in the badges VP35:A13V. Ideally this would still be what the user copies if they use the clipboard but that's not super important if it's tricky.

Questions:

• What happens for segments/genes without mutations? Are they omitted or do we see lots of headings with no info?
  Ok here's the answer: they are just not shown 👍

[anna-parker]

@corneliusroemer - great idea - think this should be possible with CSS Off-Screen Positioning - I will just need to figure out how to do this with tailwind - I will try to see if I can do this quickly or I will create a follow up issue.

Update: tailwind has the screenreader-only class which is intended just for this use case.

[corneliusroemer]

Quick Q:
I don't see the gene names ommitted on main now that this is merged

Did something go wrong with this?

@anna-parker

Also, maybe the substitutinos header should be bolder than the individual segments, right now GP looks like higher heading than "substitutions"