docs: update unique values guide with new library

[dPaskhin]

No description provided.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.97%. Comparing base (d516392) to head (7b79cea).
Report is 1 commits behind head on next.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #3166   +/-   ##
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  Coverage   99.96%   99.97%           
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  Files        2797     2797           
  Lines      227777   227777           
  Branches      581      582    +1     
=======================================
+ Hits       227702   227715   +13     
+ Misses         75       62   -13     

see 2 files with indirect coverage changes

[Shinigami92]

Team Decision:

We discussed the inclusion of third-party extension code in our documentation and concluded that maintaining it in multiple locations may not be efficient. By removing it from our documentation, you have the flexibility to manage your package independently, without you having to make further updates on our end.
That being said, we're more than happy to include links to other packages, like yours.

This also applies to enforce-unique.

Please remove everything from line 30 onward.