[ref] rework DursMsg enum & move dal to blockchain sublib

.gitlab-ci.yml

Cargo.lock

Cargo.toml

bin/durs-server/Cargo.toml

bin/durs-server/src/main.rs

lib/core/core/Cargo.toml

lib/core/core/lib.rs

lib/core/core/router.rs

lib/core/message/Cargo.toml

lib/core/message/events.rs

lib/core/message/lib.rs

lib/core/message/requests.rs

lib/core/message/responses.rs

lib/core/module/lib.rs

lib/core/network/events.rs

lib/modules/blockchain/blockchain-dal/Cargo.toml

lib/modules/blockchain/blockchain-dal/balance.rs

lib/modules/blockchain/blockchain-dal/block.rs

lib/modules/blockchain/blockchain-dal/certs.rs

lib/modules/blockchain/blockchain-dal/clippy.toml