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

package.json

@@ -0,0 +1,28 @@
+{
+  "name": "aiui",
+  "version": "0.1.0",
+  "private": true,
+  "description": "The next-generation AI content surface UI",
+  "license": "MIT",
+  "scripts": {
+    "dev": "pnpm --filter @aiui/app dev",
+    "dev:core": "pnpm --filter @aiui/core dev",
+    "build": "turbo build",
+    "test": "turbo test",
+    "lint": "turbo lint",
+    "typecheck": "turbo typecheck",
+    "clean": "turbo clean"
+  },
+  "devDependencies": {
+    "turbo": "latest",
+    "typescript": "~5.8.0"
+  },
+  "packageManager": "pnpm@10.30.3",
+  "engines": {
+    "node": ">=20.0.0",
+    "pnpm": ">=10.0.0"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": ["esbuild"]
+  }
+}