Add pre-commit/prek file again, update Ruff, and fix lints

[mdekstrand]

This adds pre-commit / pre-k lints again, and fixes lints with updated Ruff.

Closes #1203.

• Add pre-commit config
• Remove hk config
• Auto-deactivate hk
• Update CI checks for prek / pre-commit
• Add prek to devcontainer

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.49%. Comparing base (f871317) to head (56b701c).

Files with missing lines	Patch %	Lines
src/lenskit/parallel/ray.py	50.00%	1 Missing ⚠️
src/lenskit/tuning/_optuna/results.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1216   +/-   ##
=======================================
  Coverage   90.49%   90.49%           
=======================================
  Files         263      263           
  Lines       17605    17605           
=======================================
  Hits        15931    15931           
  Misses       1674     1674           

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