ChatGPT Constructor: Add widget

[VesnaT]

Issue

Description of changes

Includes

• Code changes
• Tests
• Documentation

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -3.20% ⚠️

Comparison is base (78ae80f) 37.12% compared to head (6d55992) 33.92%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #262      +/-   ##
==========================================
- Coverage   37.12%   33.92%   -3.20%     
==========================================
  Files           8        9       +1     
  Lines        1382     1515     +133     
==========================================
+ Hits          513      514       +1     
- Misses        869     1001     +132     

Files Changed	Coverage Δ
...contrib/prototypes/widgets/owchatgptconstructor.py	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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