feat: Added NumberedItemReference

[dolanmiu]

Resolves: #3041

Adding linting and more tests to make it pass CI

Thank you!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (5af1045) to head (d1856d0).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #3042   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          289       290    +1     
  Lines         8712      8737   +25     
  Branches      1412      1415    +3     
=========================================
+ Hits          8712      8737   +25     

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[Alexnortung]

Hi @dolanmiu,

Thanks for merging my commit! And thanks for the great work. I noticed that the lint was failing, saying

Use a type instead of an interface

However the documentation says (link)

Do not use type, but rather use Interfaces. type cannot be extended, and a class cannot implement it.

Maybe this should be changed? :)

[dolanmiu]

Documentation updated. Thanks!