Fix use of "show all regions with data" feature in SV inspector with TRA entries (with CHR2 from INFO)

[cmdcolin]

Changes featuresRefNamesP (which asynchronously initializes a FromConfigAdapter) to a simpler function that looks at the set of feature refNames and combines it with feature.INFO?.CHR2.

also fixes a couple other small things including

• moving a jexl addFunction to plugin installation
• add javadoc style contents

this bug was I think noted by a user at PAG2023

[codecov]

Codecov Report

Merging #3566 (70d0672) into main (d9e5ecc) will increase coverage by 0.02%.
The diff coverage is 82.50%.

@@            Coverage Diff             @@
##             main    #3566      +/-   ##
==========================================
+ Coverage   62.65%   62.67%   +0.02%     
==========================================
  Files         866      866              
  Lines       30285    30275      -10     
  Branches     7290     7289       -1     
==========================================
  Hits        18975    18975              
+ Misses      11119    11111       -8     
+ Partials      191      189       -2     

Impacted Files	Coverage Δ
...ctorView/models/breakpointSplitViewFromTableRow.js	11.11% <37.50%> (ø)
...ctor/src/SvInspectorView/models/SvInspectorView.ts	70.79% <90.00%> (-1.21%)	⬇️
plugins/sv-inspector/src/SvInspectorView/index.ts	100.00% <100.00%> (ø)
products/jbrowse-web/src/util.ts	48.33% <0.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more