Optionally skip approval for Copilot coding agent Actions workflows

GitHub has added a new repository setting that allows administrators to skip the human approval requirement for GitHub Actions workflows triggered by the Copilot coding agent. Previously, Copilot was treated like an outside contributor, requiring manual approval before workflows could run. The new opt-in setting lets workflows run automatically, speeding up the feedback loop for CI/CD validation, though it comes with security trade-offs since workflows may have access to tokens, secrets, and repository permissions.