feat: separate commands into groups

[quantumsheep]

Closes #2497

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 79.74684% with 16 lines in your changes missing coverage. Please review.

Project coverage is 74.79%. Comparing base (64be9ca) to head (5c2c803).
Report is 1128 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/core/cobra_builder.go	60.86%	8 Missing and 1 partial ⚠️
internal/core/cobra_usage_builder.go	66.66%	4 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2861      +/-   ##
==========================================
+ Coverage   74.64%   74.79%   +0.15%     
==========================================
  Files         144      144              
  Lines       28857    29095     +238     
==========================================
+ Hits        21540    21762     +222     
- Misses       6573     6585      +12     
- Partials      744      748       +4     

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[Codelax]

As utility commands I can see:

• scw iam ssh-key init
• scw alias *
• scw apple-silicon {ssh, wait}
• scw autocomplete
• scw baremetal server wait
• scw cockpit cockpit wait
• scw config *
  ...