add basic vite setup

package.json

@@ -2,6 +2,7 @@
   "private": true,
   "workspaces": [
     "docs",
+    "demos",
     "packages/*"
   ],
   "browserslist": [
@@ -11,6 +12,7 @@
   ],
   "scripts": {
     "start": "yarn --cwd ./docs start",
+    "start:demos": "yarn --cwd ./demos start",
     "lint": "eslint --quiet --no-error-on-unmatched-pattern ./",
     "lint:fix": "eslint --fix --quiet --no-error-on-unmatched-pattern ./",
     "test:open": "cypress open --project tests",