Added -rs args and refactored cli.py

[HoJLter]

What do you think about this?

P.S.: I also need to update the tests but I will do it later

Re:#176

[HoJLter]

Done :)

[HoJLter]

what about me?)

[hugovk]

Not forgotten, please be patient :)

[codecov[bot]]

Codecov Report

:x: Patch coverage is 79.22078% with 16 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 80.14%. Comparing base (8bc2bc4) to head (300b0d3). :warning: Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/em/cli.py	75.75%	16 Missing :warning:

:exclamation: There is a different number of reports uploaded between BASE (8bc2bc4) and HEAD (300b0d3). Click for more details.

HEAD has 9 uploads less than BASE

Flag	BASE (8bc2bc4)	HEAD (300b0d3)
ubuntu-latest	7	0
macos-latest	7	6
windows-latest	7	6

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #178       +/-   ##
===========================================
- Coverage   91.40%   80.14%   -11.26%     
===========================================
  Files           3        3               
  Lines         128      136        +8     
===========================================
- Hits          117      109        -8     
- Misses         11       27       +16     

Flag	Coverage Δ
macos-latest	80.14% <79.22%> (-9.70%)	:arrow_down:
ubuntu-latest	?
windows-latest	80.14% <79.22%> (-9.70%)	:arrow_down:

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[hugovk]

Please only do one thing in the PR: either add a new feature, or refactor without changing functionality. That will make it easier to review, as I'm not sure we do need a refactor. And we shouldn't need a large rewrite of tests when refactoring.

Also please make sure the tests pass, and try to include changes with test coverage.