Add support for CKTap protocol

**Describe the enhancement**

Add [CKTap] protocol support for BDK based wallets used on Android or iOS devices.

**Use case**

Supporting the CKTap protocol would allow a BDK based mobile wallet to:

1. Setup, view balance and transactions, and sweep funds from a [SATSCARD] card via an NFC tap.
2. Setup, view balance and transactions, and sign or co-sign transactions using a [TAPSIGNER] card via an NFC tap.

**Additional context**

Some functionality may make sense to move to the BDK rust library or a new rust crate, such as the [CBOR] message structures.

This enhancement was suggested by @nvk.

[CKTap]: https://github.com/coinkite/coinkite-tap-proto/blob/master/docs/protocol.md
[SATSCARD]: https://satscard.com/
[TAPSIGNER]: https://tapsigner.com/
[CBOR]: https://en.wikipedia.org/wiki/CBOR

Start by reading the linked CKTap protocol documentation and compare its requirements with the existing BDK FFI support for Android and iOS. Define the scope for CBOR message structures and wallet operations, then verify that setup, balance and transaction access, sweeping, and transaction signing or co-signing work over NFC.

Written by the indexing model from the issue text.