feat(core): add custom entry to Select Editor/Filter collections

[ghiscoding]

• add 2 new methods (addCustomFirstEntry, addCustomLastEntry) to optionally add entry on both end of the collection

[codecov]

Codecov Report

Merging #133 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #133   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          196       196           
  Lines        11225     11245   +20     
  Branches      3802      3812   +10     
=========================================
+ Hits         11225     11245   +20     

Impacted Files	Coverage Δ
packages/common/src/editors/selectEditor.ts	100.00% <100.00%> (ø)
packages/common/src/filters/selectFilter.ts	100.00% <100.00%> (ø)

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