refactor (v2): better arch

Co-authored-by: Copilot <copilot@github.com>

crates/adapters/auth/src/lib.rs

@@ -0,0 +1,8 @@
+pub mod config;
+pub mod password;
+
+#[cfg(feature = "jwt")]
+pub mod jwt;
+
+#[cfg(feature = "oidc")]
+pub mod oidc;