remove contrib folder

[davidspek]

Closes: #3992, #3541

The contrib folder isn't maintained and is mainly just bloating this repo. This PR removes it to clean shop.

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +1.97% 🎉

Comparison is base (97957b1) 55.62% compared to head (6fea548) 57.59%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4003      +/-   ##
==========================================
+ Coverage   55.62%   57.59%   +1.97%     
==========================================
  Files         110      108       -2     
  Lines       11001    10536     -465     
==========================================
- Hits         6119     6068      -51     
+ Misses       4196     3792     -404     
+ Partials      686      676      -10     

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[thaJeztah]

From the last ticket;

completely fair. The travesty is that I feel the community needs a simple token server, and a demo of using it with the distribution-registry. 😿

Is there anything in that area that we need to preserve in contrib? ("contrib" is implicitly considered "may be unmaintained")

[thaJeztah]

Doh! didn't refresh my tab, and didn't realise it was already merged

[milosgajdos]

We dont want to preserve anything from there 😄 if the need arises we can reconsider it.