refactor: deps cleanup, split openapi, extract api-types crate

crates/presentation/src/openapi/auth.rs

@@ -0,0 +1,12 @@
+use api_types::{LoginRequest, LoginResponse, RegisterRequest};
+use utoipa::OpenApi;
+
+#[derive(OpenApi)]
+#[openapi(
+    paths(
+        crate::handlers::api::login,
+        crate::handlers::api::register,
+    ),
+    components(schemas(LoginRequest, LoginResponse, RegisterRequest)),
+)]
+pub struct AuthDoc;