init: @ui-arch 私人组件库 monorepo

- core/table-core: Headless 表格内核（排序/筛选/分页/选择插件 + 冒烟 9 项）
- core/frame: signal/computed/effect + hyperscript 微框架（零依赖）
- skin/ui: 16 个 DOM 组件（含自绘 select、滑动指示条 tabs、行选择 dataTable、form 表单校验）
- design/tokens: --ua-* 设计令牌（light/dark）
- tools/cli: ua 命令行（index/list/info/docs/style/mcp）+ MCP 注册表服务
- apps: demo 演示站（esbuild 单文件）+ docs 双轨文档（人类版 + llms-full.txt）

apps/demo/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@ui-arch/demo",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Interactive demo app for the @ui-arch component library, bundled to a single HTML file",
+  "type": "module",
+  "scripts": {
+    "build": "node build.mjs",
+    "typecheck": "tsc -p tsconfig.json"
+  },
+  "dependencies": {
+    "@ui-arch/frame": "workspace:*",
+    "@ui-arch/ui": "workspace:*"
+  },
+  "license": "MIT"
+}