chore: remove srxconfutils pip install from ci and update package entry point

[zmx27]

Closes #37

[zmx27]

@sbillinge ready for review

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7b9a5ea) to head (161debe).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #43   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           48        48           
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  Hits            48        48           

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[sbillinge]

Please see comments

[sbillinge]

I think the command line app can just be called srxplanar. Less for folks to type

[sbillinge]

@zmx27 please let me know when you make this change (change the script name in pyproject.toml to just srxplanar so the user just has to type srxplanar at the command line (easier to remember and less to type).

Please could you also check the docs to make sure they build properly and can be followed?