Add support for api/ folder (#129)

* feat: detect api/ folder from tuono CLI

* feat: prevent adding the API in the data endpoints list

* feat: create basic API handler proc macro

* feat: parse api/ and build .tuono/main.rs file

* chore: remove unused cargo dependencies

* refactor: tuono base health_check

* fix: remove failing test

* feat: update version to v0.14.0

crates/tuono_lib/src/lib.rs

@@ -15,7 +15,7 @@ pub use payload::Payload;
 pub use request::Request;
 pub use response::{Props, Response};
 pub use server::Server;
-pub use tuono_lib_macros::handler;
+pub use tuono_lib_macros::{api, handler};
 
 // Re-exports
 pub use axum;