feat(cli): add `debug` subcommand + debug/performance skill sections #624

Bugbot Review

Bugbot Analysis Progress (2m 42s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (2m 31s)
✅ Posted analysis results (9s)

Final Result: Bugbot completed review and found 3 potential issues. 8 previously reported issues remain unresolved.

Request ID: serverGenReqId_9b6588a0-5018-4e39-8f21-56d25ca4b337

Cursor Bugbot has reviewed your changes and found 3 potential issues.

There are 11 total unresolved issues (including 8 from previous reviews).

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