I made the first commit of a Nostr Signer capacitorjs plugin which incorporates both NIP-55 and NIP-07 here:

https://github.com/chebizarro/nostr-signer-capacitor-plugin

I have quite a bit of experience with intents after developing an Android navigation app for the blind, but less so with the capcitorjs framework. I reckon I'll have a working coracle integration soon enough though