Phase 0 of crate extraction. Purely additive — adds two small types (ConnectionCredentials, RemoteIdentity) to a new credentials.rs module in alknet-core. No other crates touched. All workspace tests pass.
Phase 0 of crate extraction. Purely additive — adds two small types (ConnectionCredentials, RemoteIdentity) to a new credentials.rs module in alknet-core. No other crates touched. All workspace tests pass.