Add scripts

Author: bendera

packages/demo/package.json

@@ -5,9 +5,11 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
+    "start": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "link-all": "npm link @vscode-elements/react-elements && npm link @vscode-elements/elements"
   },
   "dependencies": {
     "@vscode-elements/elements": "^1.7.0",