bark: Add Lightning receives for Ark addresses

I am working on making a bark lightning address server. In order to make it the least trusted possible I needed a way to receive to another user's ark address so I never take custody of the funds, they just try that I claim it to their address rather than my own.

Add a separate invoice flow that lets a wallet claim an incoming Lightning payment and forward the resulting Ark VTXO to another Ark address. Existing invoice creation remains unchanged, while forwarded receives persist the destination so mailbox-driven claims can complete without the recipient being online.

This was all vibe coded so feel free to roast it / tell me to do it manually

Summary by CodeRabbit

• New Features
  • Added lightning invoice-for-address and a REST endpoint to create BOLT11 invoices that forward the claimed Ark VTXO to a specified Ark address (optional description, optional wait-to-claim, optional token).
  • Added support for delivering Lightning receive outputs to an optional caller-chosen destination address.
• Bug Fixes
  • Improved Lightning receive progress handling for the delivering phase, including claimability and cancellation behavior.
• Documentation
  • Updated OpenAPI and client/CLI documentation with the new request model, endpoint, and delivering state.
• Tests
  • Added integration tests for forwarded receives to offline addresses and for receives to the wallet’s own address.