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/workflow-dashboard/README.md

@@ -1,24 +0,0 @@
-# @uncaged/workflow-dashboard
-
-Web dashboard for the Uncaged Workflow engine. Connects to the local
-`uncaged-workflow serve` API to display threads, workflows, and CAS data.
-
-## Development
-
-```bash
-# Start the local API server (in another terminal)
-uncaged-workflow serve
-
-# Start the dashboard dev server
-bun run dev
-```
-
-Opens at http://localhost:5173. Vite proxies `/api/*` to `localhost:7860`.
-
-## Build
-
-```bash
-bun run build
-```
-
-Output goes to `dist/` — static files ready for CF Pages or any host.