feat: add Vercel deployment dashboard widget plugin

[srjaykikani]

Summary

• Add new Payload CMS plugin @jhb.software/payload-vercel-dashboard-widget for monitoring Vercel deployments
• Dashboard widget showing current production deployment status with color-coded pills
• One-click deployment trigger button
• Multi-language support (English and German)
• Configurable widget min/max width
• Graceful error handling with user-friendly messages

Features

• Active Deployment: Shows the last ready deployment with timestamp and status
• Latest Deployment: Shows in-progress builds when different from active
• Trigger Deploy: Button to trigger new production deployments
• Status Pills: Color-coded status (Ready=green, Building=yellow, Error=red)

Configuration

vercelDashboardPlugin({
  vercel: {
    apiToken: process.env.VERCEL_API_TOKEN!,
    projectId: process.env.VERCEL_PROJECT_ID!,
    teamId: process.env.VERCEL_TEAM_ID, // Optional
  },
  widget: {
    minWidth: 'medium',
    maxWidth: 'full',
  },
})

Test plan

• Widget displays deployment info correctly
• Error states handled gracefully
• Trigger deployment button works
• Multi-language translations work
• Build passes with no errors
• Lint passes with no warnings

Closes jhb-dev/jay-jens-payload#55

[jhb-dev]

Thanks @srjaykikani. Looks good so far. I made some minor adjustments.

I am currently experimenting with a better way to trigger the frontend deployments. Once I am done with that, I will commit it to this PR and merge it.

[srjaykikani]

Thanks You!