docs: Update auth package documentation for Dubbo-

internal/rpc/auth/doc.go

@@ -0,0 +1,15 @@
+// Package auth provides the implementation of the authentication service.
+// It uses Dubbo-go for RPC communication.
+//
+// The auth package is responsible for managing user authentication. It provides
+// functions for user login, logout, and session management. The package interacts
+// with the user database to verify user credentials and manage user sessions.
+//
+// The main function in this package is the Start function, which starts the
+// authentication service. It initializes a new Dubbo-go server, registers the
+// authentication service with the server, and then starts the server.
+//
+// Other important functions in this package include Login and Logout, which
+// handle user login and logout respectively, and CheckSession, which checks
+// whether a user session is valid.
+package auth