Add json linter to pre-commit

[aobolensk]

No description provided.

[chatgpt-codex-connector]

💡 Codex Review

https://github.com/learning-process/parallel_programming_course/blob/5b39fe36f224eead6a2dde02e339ceb6e9e5ce69/.#L1
Unable to review due to sandbox execution failure

Could not inspect commit 544688a1af9098fb123a1a317529b79f22f7ee12 because every shell command (e.g., pwd, ls) fails immediately with the sandbox error error running landlock: Sandbox(LandlockRestrict), so no files or diffs could be accessed for review. Please rerun in an environment where repository commands can execute.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.03%. Comparing base (d50d2bc) to head (5b39fe3).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #706   +/-   ##
=======================================
  Coverage   94.03%   94.03%           
=======================================
  Files          15       15           
  Lines         486      486           
  Branches      181      181           
=======================================
  Hits          457      457           
  Partials       29       29           

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