fix: add root vercel.json to configure website subdirectory build

Vercel was failing because it couldn't find the build configuration.
This configures Vercel to:
- Build from website/ subdirectory
- Output to website/dist
- Use Vite framework

Co-authored-by: Ona <no-reply@ona.com>

Author: gHashTag

vercel.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "https://openapi.vercel.sh/vercel.json",
+  "buildCommand": "cd website && npm install && npm run build",
+  "outputDirectory": "website/dist",
+  "installCommand": "cd website && npm install",
+  "framework": "vite"
+}