🧪 test: add test file for post-edit-check.sh

[sstklen]

🎯 What: Added a missing test suite for hooks/post-edit-check.sh to ensure it correctly identifies ignored files and triggers warnings for code files.
📊 Coverage: Covered all ignored file types (*.md, *.txt, *.log, *.json.bak*, *.bak*) and verified output is empty. Covered code files (.py, .sh, .js, .rb) and verified the Ripple Check reminder is output.
✨ Result: Improved test coverage by verifying the behavior of post-edit-check.sh accurately across multiple different file extensions, which acts as a safety net for any future refactoring.

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PR created automatically by Jules for task 16833504632591198202 started by @sstklen

[google-labs-jules]

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