cli-test: more commands and tests

[filmaj]

• add some more tests to the shell module
• expose slack workspace list as a top-level command

[codecov]

Codecov Report

Attention: Patch coverage is 30.00000% with 42 lines in your changes are missing coverage. Please review.

Project coverage is 81.68%. Comparing base (5efe7f3) to head (c575cff).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1794      +/-   ##
==========================================
+ Coverage   80.41%   81.68%   +1.27%     
==========================================
  Files          35       35              
  Lines        7586     7612      +26     
  Branches      308      313       +5     
==========================================
+ Hits         6100     6218     +118     
+ Misses       1474     1382      -92     
  Partials       12       12              

Flag	Coverage Δ
cli-hooks	95.07% <ø> (ø)
cli-test	52.73% <30.00%> (+7.25%)	⬆️
oauth	76.51% <ø> (ø)
socket-mode	59.41% <ø> (ø)
web-api	96.48% <ø> (ø)
webhook	95.20% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.