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/package.json

@@ -1,43 +0,0 @@
-{
-  "name": "@uncaged/workflow-dashboard",
-  "version": "0.1.0",
-  "files": [
-    "dist",
-    "package.json"
-  ],
-  "private": true,
-  "type": "module",
-  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
-  },
-  "dependencies": {
-    "@radix-ui/react-collapsible": "^1.1.12",
-    "@radix-ui/react-dialog": "^1.1.15",
-    "@radix-ui/react-scroll-area": "^1.2.10",
-    "@radix-ui/react-select": "^2.2.6",
-    "@radix-ui/react-separator": "^1.1.8",
-    "@radix-ui/react-slot": "^1.2.4",
-    "@radix-ui/react-tooltip": "^1.2.8",
-    "@xyflow/react": "^12.10.2",
-    "class-variance-authority": "^0.7.1",
-    "clsx": "^2.1.1",
-    "lucide-react": "^1.16.0",
-    "react": "^19.2.6",
-    "react-dom": "^19.2.6",
-    "react-markdown": "^10.1.0",
-    "react-router": "^7.15.1",
-    "shiki": "^4.0.2",
-    "tailwind-merge": "^3.6.0"
-  },
-  "devDependencies": {
-    "@tailwindcss/vite": "^4.2.4",
-    "@types/react": "^19.2.14",
-    "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^6.0.1",
-    "tailwindcss": "^4.2.4",
-    "typescript": "^6.0.3",
-    "vite": "^8.0.11"
-  }
-}