openwallet-foundation/multipaz ? reverse-engineered prompt

Build me a Kotlin Multiplatform SDK for digital credentials, with a simple sample app and the main pieces needed to issue, store, and present credentials on Android, iPhone, and server side.

I want it to support ISO mdoc style credentials and SD JWT VC, plus presentment flows like proximity sharing, OpenID4VP, and the Digital Credentials API. Please include a clean core library, a nicer UI layer for Compose and SwiftUI, and a command line tool for generating test certificates and other helper tasks.

It should feel like a real starter kit for a wallet and verifier, with sample data, document types, and enough demo screens or examples to show the main flows end to end. If you need to check current docs or standards details online, go ahead and do that.