♻️ refactor(core): rename list module to message

- rename list module to message for better clarity
- update associated exports and references

src/lib.rs

@@ -7,11 +7,11 @@
 mod credential;
 mod error;
 mod labels;
-mod list;
+mod message;
 pub(crate) mod utils;
 
 pub use credential::Credential;
 pub use error::Error;
 pub use labels::Labels;
-pub use list::DEFAULT_MAX_RESULTS;
-pub use list::List;
+pub use message::DEFAULT_MAX_RESULTS;
+pub use message::Message;