[frontend] add System in author update via background task (#6282)

[Archidoit]

issue: #6282

• add possibility to create system from the author edition field (for the moment we can only add identities and organizations whereas systems are also listed in the author list)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.63%. Comparing base (b483357) to head (c564a76).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6286      +/-   ##
==========================================
- Coverage   66.64%   66.63%   -0.01%     
==========================================
  Files         541      541              
  Lines       64458    64458              
  Branches     5258     5257       -1     
==========================================
- Hits        42957    42952       -5     
- Misses      21501    21506       +5     

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