Add scroll zoom, d-pad, and more click+drag options to dotplot

[cmdcolin]

1. Adds d-pad pan buttons
2. Makes wheel scroll perform a zoom instead of a pan (user can change if they want, but wheel scroll to zoom is a more common UI interaction: think google map)
3. Reduces the action of wheel scroll by dividing by a reduction factor, this makes movements less dramatic
4. Adds holding ctrl+click-and-drag to pan view. Can also switch around so pan view is the default click-and-drag, and holding control performs region select. The latter is almost more user intuitive, but it reduces discoverability of "Open in linear synteny view" and the precise zooms, so the default is still click-and-drag to select region
5. Stricter zoom and scroll boundaries for the dotplot, to avoid scrolling out of view

Fixes #3554

[cmdcolin]

Example screenshot showing the toggling mode for click and drag mode select

[codecov]

Codecov Report

Merging #3561 (fea9adc) into main (c1beaf1) will decrease coverage by 0.02%.
The diff coverage is 57.60%.

@@            Coverage Diff             @@
##             main    #3561      +/-   ##
==========================================
- Coverage   62.61%   62.60%   -0.02%     
==========================================
  Files         864      866       +2     
  Lines       30269    30311      +42     
  Branches     7260     7273      +13     
==========================================
+ Hits        18953    18976      +23     
- Misses      11126    11145      +19     
  Partials      190      190              

Impacted Files	Coverage Δ
...-view/src/DotplotView/components/WarningDialog.tsx	0.00% <0.00%> (ø)
products/jbrowse-desktop/src/Loader.tsx	0.00% <0.00%> (ø)
...dotplot-view/src/DotplotView/components/Header.tsx	37.50% <42.85%> (-10.00%)	⬇️
...ot-view/src/DotplotView/components/DotplotView.tsx	51.93% <47.61%> (+1.10%)	⬆️
...iew/src/DotplotView/components/DotplotWarnings.tsx	50.00% <50.00%> (ø)
...lot-view/src/DotplotView/components/PanButtons.tsx	50.00% <50.00%> (ø)
plugins/dotplot-view/src/DotplotView/model.ts	60.40% <71.42%> (+0.65%)	⬆️
packages/core/util/Base1DViewModel.ts	90.00% <85.71%> (+0.25%)	⬆️
plugins/dotplot-view/src/DotplotView/1dview.ts	82.14% <100.00%> (-4.23%)	⬇️
...s/linear-genome-view/src/LinearGenomeView/index.ts	100.00% <100.00%> (ø)
... and 4 more

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