chore: update ruff.toml

[AlessandroMiola]

Summary:

• 4a40d76:
  • update ruff.toml by nesting linter-specific configs under [lint] (and related); though it would work (or, actually, works) the way it currently is, the proposed one could be a preferable/more future-proof option in sight of the upcoming deprecation of top-level lint settings discussed in [tool.ruff.lint] usage in docs is inconsistent astral-sh/ruff#8449 or Deprecate top-level lint options astral-sh/ruff#7651
• e989324:
  • fixable = ["ALL"] is the default already as per https://docs.astral.sh/ruff/settings/#fixable. In my understanding, fixable should be rather used to specify those rules - among the ones to be checked - that one wants to autofix as well (provided that an autofix is available and not unsafe)
  • remove duplicate from ignore list
• 7f66f96:
  • copy changes under cookiecutter directory

PS: I'm not sure I correctly followed the contributing guidelines. The generated testone project didn't seem to embed the changes I committed before generating it; anyway, such configuration works on my side and should be backed by Ruff's docs as well

[JeyDi]

Ciao @AlessandroMiola! Sorry, I saw your merge request now, I have updated the version of Bear with ruff and uv. Can you check if it's still ok? :)
Thank you!