chore: reorganize repo — legacy packages to legacy-packages/, templates to examples/

- Move 15 old workflow-* packages to legacy-packages/ (inactive, preserved for reference)
- Rename templates/ → examples/ for clarity
- Rewrite docs/architecture.md to reflect current uwf architecture
- Active packages remain in packages/: cli-uwf, uwf-agent-hermes, uwf-agent-kit, uwf-moderator, uwf-protocol, workflow-util

小橘 🍊（NEKO Team）

packages/cli-workflow/src/cli.ts

@@ -1,9 +0,0 @@
-#!/usr/bin/env bun
-
-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);