feat(hooks): add /stop-continuation command to halt all continuation mechanisms (#1316)

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: justsisyphus <justsisyphus@users.noreply.github.com>
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/index.ts

@@ -34,3 +34,4 @@ export { createAtlasHook } from "./atlas";
 export { createDelegateTaskRetryHook } from "./delegate-task-retry";
 export { createQuestionLabelTruncatorHook } from "./question-label-truncator";
 export { createSubagentQuestionBlockerHook } from "./subagent-question-blocker";
+export { createStopContinuationGuardHook, type StopContinuationGuard } from "./stop-continuation-guard";