Unpinned ruff for CI + Cleaned up workflow files a little

[RobertoRoos]

Resolves

• Bump ruff version in Github CI #78

After #74 is merged we can also test on Python v3.14.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 47.18%. Comparing base (9d267e3) to head (e55f93e).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
sphinxarg/parser.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
+ Coverage   46.77%   47.18%   +0.41%     
==========================================
  Files          12       12              
  Lines         960      960              
  Branches      206      206              
==========================================
+ Hits          449      453       +4     
+ Misses        469      467       -2     
+ Partials       42       40       -2     

Flag	Coverage Δ
unittests	46.97% <0.00%> (+0.20%)	⬆️

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[RobertoRoos]

Annoying, after #83 the test for Python 3.14 fail (and rightly so). Let's merge #84 first, then we rebase this and merge it too.

A draft PR of both together can be found here (it seems to work): RobertoRoos#2

[RobertoRoos]

@ashb , I suspect @AA-Turner might not get to reviewing our stuff, do we want to continue waiting?