Add IRB `fix` command to rerun with corrected spelling (fixes #179)#204

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krsinghshubham:irb-fix-command

Commits on Feb 18, 2026

Implement IRB 'fix' command to rerun with corrected spelling (issue #179)
krsinghshubham
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Add discoverability hint and dym alias for fix command

krsinghshubham
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cursoragent
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