feat: Phase 2 — Thread lifecycle, execution engine, worker, CLI

- types.ts: START/END, RoleMeta, ThreadContext, Role, Moderator, WorkflowDefinition
- engine.ts: executeThread with JSONL persistence + AbortSignal
- worker.ts: per-bundle process, TCP IPC, kill individual threads
- CLI: run/ps/kill/threads/thread/thread rm commands
- 32 tests pass, biome clean

小橘 <xiaoju@shazhou.work>

packages/cli-workflow/src/cli.ts

@@ -1,3 +1,9 @@
 #!/usr/bin/env bun
-// @uncaged/cli-workflow - uncaged-workflow CLI
-console.log('uncaged-workflow');
+
+import { runCli } from "./cli-dispatch.js";
+import { resolveWorkflowStorageRoot } from "./storage-env.js";
+
+const argv = process.argv.slice(2);
+const storageRoot = resolveWorkflowStorageRoot();
+const code = await runCli(storageRoot, argv);
+process.exit(code);