Extend theme with module augmentation

[garrettjstevens]

This uses module augmentation to add the tertiary, quaternary, and base colors to our theme in TypeScript. This way, we can get rid of the @ts-ignores that are used whenever the tertiary, quaternary, or base colors are referenced.

[codecov]

Codecov Report

Merging #3132 (984fe33) into main (ad9bf14) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3132      +/-   ##
==========================================
- Coverage   58.81%   58.79%   -0.03%     
==========================================
  Files         648      648              
  Lines       29042    29042              
  Branches     7067     7067              
==========================================
- Hits        17082    17075       -7     
- Misses      11581    11588       +7     
  Partials      379      379              

Impacted Files	Coverage Δ
packages/core/ui/theme.ts	83.33% <ø> (ø)
...s/alignments/src/PileupRenderer/PileupRenderer.tsx	50.40% <ø> (ø)
...nts/src/SNPCoverageRenderer/SNPCoverageRenderer.ts	73.38% <ø> (ø)
...r-view/src/BaseChordDisplay/components/Loading.tsx	92.85% <ø> (ø)
...ierarchicalTrackSelectorWidget/components/Node.tsx	61.90% <ø> (ø)
...PluginStoreWidget/components/PluginStoreWidget.tsx	77.77% <ø> (ø)
...t/src/JobsListWidget/components/JobsListWidget.tsx	5.88% <ø> (ø)
...c/LinearGenomeView/components/OverviewScaleBar.tsx	64.51% <ø> (ø)
...svg/src/SvgFeatureRenderer/components/Segments.tsx	85.71% <0.00%> (-7.15%)	⬇️
...src/SvgFeatureRenderer/components/FeatureLabel.tsx	80.55% <0.00%> (-5.56%)	⬇️
... and 4 more

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[cmdcolin]

looks good :)