fix(shared): add task_system resolver

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

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/shared/task-system-enabled.ts

@@ -0,0 +1,9 @@
+export interface TaskSystemConfig {
+  experimental?: {
+    task_system?: boolean
+  }
+}
+
+export function isTaskSystemEnabled(config: TaskSystemConfig): boolean {
+  return config.experimental?.task_system ?? false
+}