[MNT] move pre-commit config to ruff

[arnavk23]

Reference Issues/PRs

Fixes #502

What does this implement/fix? Explain your changes.

This PR migrates the pre-commit configuration to use ruff as the unified tool for code formatting and linting, replacing the separate isort, black, and flake8 hooks. This aligns skbase with sktime and other GC.OS repositories for consistency and performance.

Does your contribution introduce a new dependency? If yes, which one?

Yes, ruff is added as a new dependency in the linters optional dependencies group in pyproject.toml. This is necessary to replace the functionality of isort, black, and flake8, providing a single, efficient tool for linting and formatting.

What should a reviewer concentrate their feedback on?

• Correctness of the ruff configuration in pyproject.toml (rules, ignores, excludes).
• Proper setup of pre-commit hooks in .pre-commit-config.yaml

Any other comments?

PR checklist

For all contributions

• I've reviewed the project documentation on contributing
• I've added myself to the list of contributors.
• The PR title starts with either [ENH], [CI/CD], [MNT], [DOC], or [BUG] indicating whether
  the PR topic is related to enhancement, CI/CD, maintenance, documentation, or a bug.

For code contributions

• Unit tests have been added covering code functionality
• Appropriate docstrings have been added (see documentation standards)
• New public functionality has been added to the API Reference

[arnavk23]

@fkiraly Please review this pr. Focus only on the precommit file as the rest changes are caused by moving to ruff.

[codecov]

Codecov Report

❌ Patch coverage is 79.74138% with 47 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.73%. Comparing base (306958d) to head (6c27583).
⚠️ Report is 186 commits behind head on main.

Files with missing lines	Patch %	Lines
skbase/testing/test_all_objects.py	48.00%	13 Missing ⚠️
skbase/base/_meta.py	29.41%	12 Missing ⚠️
skbase/utils/deep_equals/_deep_equals.py	60.00%	12 Missing ⚠️
skbase/base/_base.py	86.36%	3 Missing ⚠️
skbase/testing/utils/_conditional_fixtures.py	66.66%	2 Missing ⚠️
skbase/utils/dependencies/_import.py	0.00%	2 Missing ⚠️
skbase/base/_clone_plugins.py	75.00%	1 Missing ⚠️
skbase/utils/dependencies/_dependencies.py	87.50%	1 Missing ⚠️
skbase/utils/git_diff.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #508      +/-   ##
==========================================
- Coverage   85.07%   83.73%   -1.35%     
==========================================
  Files          45       52       +7     
  Lines        3015     3854     +839     
==========================================
+ Hits         2565     3227     +662     
- Misses        450      627     +177     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.