ci: Change dotnet formatter

[askpt]

This PR

• This PR changes the code formatter we currently use to the new built-in in the SDK. See https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-format

Notes

• We should now use this tool since it is now shipped as part of the dotnet SDK, removing the need to install an external one.
• As pointed out in the chat, this build runs in parallel and is relatively fast. I will enable all PRs instead of those focusing on changes to .cs files.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.40%. Comparing base (11a0333) to head (26c6dd7).
Report is 1 commits behind head on main.

❗ Current head 26c6dd7 differs from pull request most recent head 1343a3c. Consider uploading reports for the commit 1343a3c to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #260   +/-   ##
=======================================
  Coverage   95.40%   95.40%           
=======================================
  Files          27       27           
  Lines        1111     1111           
  Branches      120      120           
=======================================
  Hits         1060     1060           
  Misses         34       34           
  Partials       17       17           

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