feat: initialize AIUI monorepo with project rules and core types

Foundation for the next-generation AI content surface UI:
- 16 Cursor rules files covering philosophy, Vue conventions, design system,
  content surfaces, plugin system, AI integration, renderers, security,
  Bitcoin-only policy, dev/prod modes, accessibility, performance, animation,
  mobile UX, and git workflow
- pnpm workspaces + Turborepo monorepo (@aiui/core, @aiui/app)
- Vue 3 + Vite + TypeScript + Tailwind CSS 4
- Core type system: plugins, renderers, messages, content blocks
- Plugin registry with renderer registration
- 50 mock film fixtures with search/filter utilities
- App shell with chat page layout
- Environment config templates

Made-with: Cursor

packages/app/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "@aiui/app",
+  "version": "0.1.0",
+  "private": true,
+  "description": "AIUI reference application",
+  "license": "MIT",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc --noEmit && vite build",
+    "preview": "vite preview",
+    "test": "vitest run",
+    "lint": "eslint src/",
+    "typecheck": "vue-tsc --noEmit",
+    "clean": "rm -rf dist"
+  },
+  "dependencies": {
+    "@aiui/core": "workspace:*",
+    "vue": "latest",
+    "vue-router": "latest",
+    "pinia": "latest"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "latest",
+    "vite": "latest",
+    "vue-tsc": "latest",
+    "vitest": "latest",
+    "eslint": "latest",
+    "typescript": "~5.8.0",
+    "tailwindcss": "latest",
+    "@tailwindcss/vite": "latest"
+  }
+}