feat(Formatters): add new Formatters.iconBoolean for icon w/truthy val

[ghiscoding]

• this formatter is meant to be generic to display any icon the user want to display any type of icon on a boolean truthy value. It was created to replace the Formatters.checkmark which was too restrictive since it only worked with Font-Awesome 4 and only 1 assigned icon. The new formatter allows you to use any CSS class you want to use on a truthy value.
• note that any of these values is considered falsy and will not show the icon: false, undefined, null, 0 or any negative number

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f94fb12) 100.00% compared to head (f0c741e) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1228   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          245       246    +1     
  Lines        17281     17293   +12     
  Branches      6250      6254    +4     
=========================================
+ Hits         17281     17293   +12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.