Multi-level synteny rubberband

[cmdcolin]

Fixes #2658

I don't know if there is a good way to style it but I found it is maybe good not to be too visually intrusive, so in this example, it is invisible. But, if you mouse over it, a clearly visible vertical guide that goes over the full height of both views appears

And then after clicking and dragging

[codecov]

Codecov Report

Merging #2879 (784f76f) into main (af7cc43) will decrease coverage by 0.28%.
The diff coverage is 3.33%.

@@            Coverage Diff             @@
##             main    #2879      +/-   ##
==========================================
- Coverage   59.98%   59.70%   -0.29%     
==========================================
  Files         590      591       +1     
  Lines       26631    26746     +115     
  Branches     6477     6510      +33     
==========================================
- Hits        15975    15968       -7     
- Misses      10352    10474     +122     
  Partials      304      304              

Impacted Files	Coverage Δ
...mparativeView/components/LinearComparativeView.tsx	0.00% <0.00%> (ø)
...rc/LinearComparativeView/components/RubberBand.tsx	0.00% <0.00%> (ø)
...omparative-view/src/LinearComparativeView/model.ts	6.36% <0.00%> (-0.44%)	⬇️
...iew/src/LinearGenomeView/components/RubberBand.tsx	85.14% <100.00%> (ø)
...nts/src/SNPCoverageRenderer/SNPCoverageRenderer.ts	67.47% <0.00%> (-5.70%)	⬇️

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[cmdcolin]

during chat with @rbuels he mentioned the invisible should be ok because the vertical guide is prominent. could consider adding selection to middle area too, but maybe can keep as is for now