feat: add custom commands (#204)

[mint-dewit]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• What is the current behavior? (You can also link to an open issue here)

• What is the new behavior (if this is a feature change)?

• Other information:

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.07%. Comparing base (278eb2b) to head (9763f84).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #205      +/-   ##
==========================================
+ Coverage   82.03%   82.07%   +0.04%     
==========================================
  Files          14       14              
  Lines         729      731       +2     
  Branches      140      165      +25     
==========================================
+ Hits          598      600       +2     
+ Misses        130      127       -3     
- Partials        1        4       +3     

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[z1glr]

I tried it briefly yesterday and it was working flawlessly. Thank you very much for the fast implementation