Rename jbrowse cli add-track --type to --trackType

[cmdcolin]

Renames the current --type option to --trackType

In reference to
#1545

We could also consider adding an adapterType that overrides guessAdapterType, but that is currently difficult because every data adapter is kind of different (there is no standard based on supplying just urlTemplate...)

[codecov]

Codecov Report

Merging #1565 (f783144) into master (fc19bb3) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1565      +/-   ##
==========================================
+ Coverage   59.50%   59.51%   +0.01%     
==========================================
  Files         435      435              
  Lines       19561    19561              
  Branches     4564     4564              
==========================================
+ Hits        11640    11642       +2     
+ Misses       7627     7625       -2     
  Partials      294      294              

Impacted Files	Coverage Δ
products/jbrowse-cli/src/commands/add-track.ts	46.22% <100.00%> (ø)
...inearGenomeView/components/RefNameAutocomplete.tsx	89.65% <0.00%> (+3.44%)	⬆️

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[rbuels]

this is a breaking change, but it's probably early enough that we can slip it in without too much worry