TaxonomyPicker: term actions

[siata13]

Q	A
Bug fix?	[ ]
New feature?	[x]
New sample?	[ ]

What's in this Pull Request?

Add term actions functionality to the TaxonomyPicker control. Term actions allow to create own actions that will be executed on the concrete term, e.g. get other term labels or ad new term.

[codecov-io]

Codecov Report

Merging #235 into dev will decrease coverage by 2.75%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev     #235      +/-   ##
==========================================
- Coverage   72.71%   69.95%   -2.76%     
==========================================
  Files          16       15       -1     
  Lines         744      689      -55     
  Branches      138      133       -5     
==========================================
- Hits          541      482      -59     
- Misses        159      164       +5     
+ Partials       44       43       -1

Impacted Files	Coverage Δ
src/controls/chartControl/PaletteGenerator.ts	26.31% <0%> (-32.23%)	⬇️
src/controls/chartControl/AccessibleChartTable.tsx	76% <0%> (-9.72%)	⬇️
src/controls/chartControl/ChartControl.types.ts	100% <0%> (ø)	⬆️
src/controls/chartControl/index.ts
src/controls/listView/ListView.tsx	56.56% <0%> (+0.31%)	⬆️
src/controls/chartControl/ChartControl.tsx	67.88% <0%> (+4.85%)	⬆️

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[estruyf]

Thanks @siata13 I have done some refactoring + documentation changes. This is a helpful enhancement to the control!