Reach out to other repos that use rust-bitcoin and uniffi

We're just at the point where we could let others know about the library. If we're lucky some of those might have done the work on some of the types we need and we'd get them for free.

- [ ] [Liquid Wallet Kit](https://github.com/Blockstream/lwk)
- [ ] [rust-nostr](https://github.com/rust-nostr/nostr)
- [ ] [Cove](https://github.com/bitcoinppl/cove)
- [ ] [Payjoin Dev Kit](https://github.com/payjoin/rust-payjoin)
- [ ] [Breez SDK](https://github.com/breez/breez-sdk-greenlight/blob/main/libs/sdk-bindings/src/breez_sdk.udl)
- [ ] [LDK-Node](https://github.com/lightningdevkit/ldk-node)
- [ ] [BDK](https://github.com/bitcoindevkit/bdk-ffi)

Review the linked Liquid Wallet Kit, rust-nostr, Cove, Payjoin Dev Kit, Breez SDK, LDK-Node, and BDK repositories, starting with their Rust and UniFFI-related code where linked. Determine how outreach should be conducted and what information should be recorded for each repository; done is not defined in the issue.

Written by the indexing model from the issue text.