feat(worbench-setup): make plugin development self-contained

[KilianTrunk]

No description provided.

[SlimDeluxe]

Can you please look into the tests failing?

Also, why are copies of the model policies required, can't the existing ones be used instead?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.09%. Comparing base (9cd69dd) to head (161516c).

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #39      +/-   ##
============================================
- Coverage     38.37%   38.09%   -0.29%     
  Complexity     1425     1425              
============================================
  Files           104      104              
  Lines          6673     6620      -53     
============================================
- Hits           2561     2522      -39     
+ Misses         4112     4098      -14     

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