Add vercel deploy workflows

[cte]

Description

Enable GHA deploys for roocode.com.

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Important

Add GitHub Actions workflows for deploying and previewing roocode.com using Vercel.

• Workflows:
  • Adds website-deploy.yml for deploying roocode.com to production using Vercel.
  • Adds website-preview.yml for deploying roocode.com to a preview environment using Vercel.
• Environment:
  • Both workflows use VERCEL_ORG_ID and VERCEL_PROJECT_ID from GitHub secrets.
• Jobs:
  • Both workflows run on ubuntu-latest and include steps to checkout code, setup Node.js and pnpm, install Vercel CLI, pull Vercel environment info, build, and deploy.
  • website-deploy.yml uses --prod flag for production deployment.
  • website-preview.yml uses --environment=preview for preview deployment.

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