Admin product organization categories

[chaimann]

[!IMPORTANT] Blocked by #6280

Summary

Implements interface to add product categories to product, as well as create new categories and associate them with product in one go.

When creating new category it's possible to choose "None" as Parent Category - this will create a root taxon and a taxonomy that holds that root taxon.

Checklist

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.05%. Comparing base (bbca5cc) to head (84b72e1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6296      +/-   ##
==========================================
+ Coverage   86.65%   89.05%   +2.39%     
==========================================
  Files         521      867     +346     
  Lines       11943    18434    +6491     
==========================================
+ Hits        10349    16416    +6067     
- Misses       1594     2018     +424     

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