Update ruff, switch from black to ruff, fix findings

[dbast]

This PR contains separated commits to

• Update the ruff version (requires to move settings unter tool.ruff.lint ...
• Switch from black to ruff (ruff does black compatible formatting) + update the poetry.lock (less dependencies due to no more black)
• Update poetry while at it
• Apply make format (minor changes due to old black version previously used)
• Fix / handle the remaining ruff lint finding due to new ruff rules included in the activated ruff rules set. ~100 findings where most are handled by excluding tests from some rules. (stacklevel=1 required by "B028 No explicit stacklevel keyword argument found" ... selected 1 as that is the default and also default for the new decorator in 3.13, see https://docs.python.org/3/library/warnings.html#warnings.deprecated)

No logic change of the code!

[michaelhly]

Thank you!

[codecov]

Codecov Report

Attention: Patch coverage is 80.55556% with 7 lines in your changes missing coverage. Please review.

Project coverage is 90.20%. Comparing base (2119e9d) to head (e5cab61).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #462      +/-   ##
==========================================
+ Coverage   89.16%   90.20%   +1.03%     
==========================================
  Files          28       28              
  Lines        2271     2245      -26     
==========================================
  Hits         2025     2025              
+ Misses        246      220      -26