chore: optimize ci workflow

[haraldmaida]

The CI workflow - both the local workflow using just and the GitHub workflow - do not run clippy and tests with default features. Further the GitHub workflow does not play well with branch protection.

• Added step to justfile as well as GitHub workflow that runs the tests with default features.
• Added step to "summerize" workflow results for branch protection
• Optimized CI GitHub workflow to run shorter steps before running the tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.70%. Comparing base (b398e14) to head (de16a04).
Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #51   +/-   ##
=======================================
  Coverage   96.70%   96.70%           
=======================================
  Files          31       31           
  Lines        3425     3425           
  Branches     3425     3425           
=======================================
  Hits         3312     3312           
  Misses        109      109           
  Partials        4        4           

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