Guard closed isolated workspaces on issues

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/index.ts

@@ -351,6 +351,11 @@ export {
   DEFAULT_FEEDBACK_DATA_SHARING_TERMS_VERSION,
 } from "./types/feedback.js";
 
+export {
+  getClosedIsolatedExecutionWorkspaceMessage,
+  isClosedIsolatedExecutionWorkspace,
+} from "./execution-workspace-guards.js";
+
 export {
   instanceGeneralSettingsSchema,
   patchInstanceGeneralSettingsSchema,