Update docs and licenses for GMAC

Author: SalusaSecondus

Cargo.lock

@@ -53,7 +53,3 @@ trivial_numeric_casts = "warn"
 unsafe_code = "forbid"
 unused_lifetimes = "warn"
 unused_qualifications = "warn"
-
-# DO NOT MERGE!
-[patch.crates-io]
-digest = { path = "/Users/rubin/Documents/gh/rustcrypto_traits/digest"}

Cargo.toml

@@ -0,0 +1,9 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 0.1.0 (2026-04-??)
+Initial Release