feat(demo): build a static editor preview for GitHub Pages

web/package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "dev": "vite",
     "build": "vue-tsc --noEmit && vite build",
+    "build:demo": "vue-tsc --noEmit && vite build --mode demo --base /RawMark/ --outDir dist-demo",
     "preview": "vite preview",
     "lint": "eslint --fix",
     "test": "vitest run",