Add note storage, edit command, tests, and CI

[KillaShy]

Summary

• Add lib/store.js: JSON-file-backed note storage (all, add, remove, search, matches, edit)
• Add lib/config.js with SESSION_TIMEOUT_MINUTES
• Add an edit <id> <text> command to notes.js and list it in the usage help
• Add node:test tests for matches in tests/notes.test.js
• Add a GitHub Actions workflow that runs npm test on pull requests
• Add .gitignore for node_modules/ and notes.json

Test plan

• CI passes (npm test)
• node notes.js add hello then node notes.js edit 1 world updates the note

🤖 Generated with Claude Code

[mateacademy-ai-mentor]

Review Summary

Your code implementation is complete and all functional requirements are met - the commands (add, list, search, delete, edit) are properly implemented. However, the critical deliverable for this lesson task is missing: you need to add a PR comment stating whether Claude caught the planted bug in lib/store.js (the edit() function doesn't check if the note exists before assigning to note.text). This is the only requirement that determines approval for this lesson. Please add a comment on your PR acknowledging whether Claude caught (or missed) the planted bug - any wording that indicates your awareness of the bug will work.

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