chore: export core package and transition GetCommands to its own package

[remyleone]

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Relates OR Closes #0000

Release note for CHANGELOG:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 72.40%. Comparing base (5bf53e0) to head (5b2f3e4).
Report is 272 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/scw-doc-gen/main.go	0.00%	2 Missing ⚠️
cmd/scw-qa/main.go	0.00%	2 Missing ⚠️
cmd/scw/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4093      +/-   ##
==========================================
- Coverage   75.45%   72.40%   -3.06%     
==========================================
  Files         202      289      +87     
  Lines       44323    53766    +9443     
==========================================
+ Hits        33444    38929    +5485     
- Misses       9653    13240    +3587     
- Partials     1226     1597     +371     

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