[feat] crypto: add agreement & encryption features

Cargo.lock

lib/core/conf/src/keys.rs

lib/core/conf/src/lib.rs

lib/crypto/Cargo.toml

lib/crypto/src/agreement.rs

lib/crypto/src/encryption.rs

lib/crypto/src/errors.rs

lib/crypto/src/keys/bin_signable.rs

lib/crypto/src/keys/ed25519.rs

lib/crypto/src/keys/mod.rs

lib/crypto/src/lib.rs

lib/crypto/src/rand.rs

lib/crypto/src/seeds.rs

lib/dubp/user-docs/src/documents/certification/v10.rs

lib/dubp/user-docs/src/documents/identity/v10.rs

lib/dubp/user-docs/src/documents/membership/v10.rs

lib/dubp/user-docs/src/documents/revocation/v10.rs

lib/dubp/user-docs/src/documents/transaction.rs

lib/dunp/network-documents/src/lib.rs

lib/modules/ws2p/ws2p-messages/lib.rs