Updating rust-bitcoin and supporting musig roadmap

We have a goal to update rust-elements to the latest 1.0 versions of rust-bitcoin crates; relatedly but separately we want to cleanup our APIs, and critically, we want to support musig2.

* [ ] rewrite rust-secp256k1-zkp as a wholly independent library which depends on the latest libsecp256k1-zkp
* [ ] port the rust-secp musig2 PR to rust-secp-zkp, merge it, and release it
* [ ] update rust-elements to use that
* [ ] update rust-elements to use `bitcoin-hashes 1.0`
* [ ] update rust-elements to use `bitcoin-consensus-encoding 1.0` rather than own encoding library) (blocked on https://github.com/rust-bitcoin/rust-bitcoin/pull/6184 I think)
* [ ] update rust-elemnets to use `bitcoin-units 1.0` (not yet released)

Comece revisando o trabalho de independência do rust-secp256k1-zkp e o PR de musig2 do rust-secp mencionados na checklist; em seguida, acompanhe as atualizações necessárias do crate rust-elements. O trabalho estará concluído quando o suporte a musig2 for lançado e rust-elements usar os crates bitcoin 1.0 listados, levando em conta os bloqueadores upstream mencionados.

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