Add three-judge Rig skill integration workflow using Copilot SDK (#542)

* Add three-judge Rig skill SDK integration workflow

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* Fix three-judge workflow regression-test lint failure

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

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Co-authored-by: Peli <peli@Pelis-MacBook-Pro.local>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: 4 people