Fix flags causing service to not start.

[MolotovCherry]

This is a follow up to #630 . After checking, flags indeed were causing the service start up fail. I have now tested them properly and fixed the issue.

The issue was that the rust binary expects the first arg to be the current exe, e.g. "C:\my-current-exe.exe", but I was not giving it.

This full expanded command now works (including profile too if specified).
R:\path\to\pueued.exe --config C:\path\to\pueue.yml service run

I did a small refactor in the process, cause why not

Checklist

Please make sure the PR adheres to this project's standards:

• I included a new entry to the CHANGELOG.md.
• I checked cargo clippy and cargo fmt. The CI will fail otherwise anyway.
• (If applicable) I added tests for this feature or adjusted existing tests.
• (If applicable) I checked if anything in the wiki needs to be changed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.01%. Comparing base (ea5c100) to head (d08eeaf).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #631   +/-   ##
=======================================
  Coverage   78.01%   78.01%           
=======================================
  Files          96       96           
  Lines        6786     6786           
=======================================
  Hits         5294     5294           
  Misses       1492     1492           

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[MolotovCherry]

Still a draft at the moment. I'll mark it ready once I feel I'm good to proceed.

[MolotovCherry]

I have done some testing, and it appears to work properly. Should be ready to go! 😄

[Nukesor]

Awesome, thanks :)

In it goes.