Support for Vercel Storage

[chimon2000]

Vercel has recently added its own suite of managed, serverless storage products:

• Vercel KV: Durable Redis
• Vercel Postgres: Serverless SQL
• Vercel Blob: Large file storage
• Vercel Edge Config: Global, low-latency data store

It would be nice if Dart Edge supported these new APIs, to assist developers who want to build Vercel applications with Dart Edge.