[new protocol] Liquid integration

[barbierir]

Among future protocols pls consider supporting Blockstream's Liquid network, a Bitcoin sidechain run by a federation of companies. It's based on the Elements open source protocol:
https://elementsproject.org/
https://docs.blockstream.com/developer-documentation.html#elements
The features of assets and confidential transactions will likely require custom work

[artemii235]

Hi @barbierir, thanks for creating the issue!
Our roadmap is quite set for this year: https://roadmap.atomicdex.io/, but we can consider adding Liquid support in 2023. Added to backlog.