feat(cli/unstable): add promptMultipleSelect()

[timreichen]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 90.14085% with 7 lines in your changes missing coverage. Please review.

Project coverage is 96.50%. Comparing base (7480f35) to head (6e17121).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cli/unstable_prompt_multiple_select.ts	90.14%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6223      +/-   ##
==========================================
- Coverage   96.52%   96.50%   -0.03%     
==========================================
  Files         535      536       +1     
  Lines       41030    41101      +71     
  Branches     6141     6154      +13     
==========================================
+ Hits        39606    39666      +60     
- Misses       1382     1392      +10     
- Partials       42       43       +1     

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[kt3k]

Looks good now 👍