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/core/package.json

@@ -0,0 +1,37 @@
+{
+  "name": "@aiui/core",
+  "version": "0.1.0",
+  "description": "AIUI core component library - rich AI content surface renderers",
+  "license": "MIT",
+  "type": "module",
+  "main": "./src/index.ts",
+  "types": "./src/index.ts",
+  "exports": {
+    ".": "./src/index.ts",
+    "./components/*": "./src/components/*",
+    "./composables/*": "./src/composables/*",
+    "./plugins/*": "./src/plugins/*",
+    "./types/*": "./src/types/*",
+    "./styles/*": "./src/styles/*"
+  },
+  "scripts": {
+    "dev": "vite build --watch",
+    "build": "vue-tsc --noEmit && vite build",
+    "test": "vitest run",
+    "lint": "eslint src/",
+    "typecheck": "vue-tsc --noEmit",
+    "clean": "rm -rf dist"
+  },
+  "peerDependencies": {
+    "vue": "^3.5.0"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "latest",
+    "vite": "latest",
+    "vue": "latest",
+    "vue-tsc": "latest",
+    "vitest": "latest",
+    "eslint": "latest",
+    "typescript": "~5.8.0"
+  }
+}