fix: preserve special characters in tracked paths

[rogerchappel]

Summary

• collect tracked staged and unstaged name-status and numstat data with Git's NUL-delimited output
• parse tabs and newlines in paths without losing exact path or line-stat data
• preserve rename and copy source/destination identity while retaining legacy parser behavior
• cover staged and unstaged tracked paths containing tabs and newlines end to end

Commit

• 35da9b7 fix: preserve special characters in tracked paths

Verification

• npm run release:check
• git diff --check
• git log --format='%h%x09%an%x09%ae%x09%cn%x09%ce' origin/main..HEAD

All 20 tests passed, the smoke fixture generated Markdown and JSON, and the package dry run completed successfully. The proposed commit author and committer are both Roger Chappel <miscanalysis@gmail.com>.