chore: ignore generated file in internal package only

.gitignore

@@ -14,7 +14,7 @@ app/.env
 app/.status_hash
 .idea/deployment.xml
 .idea/webServers.xml
-*.gen.go
+internal/**/*.gen.go
 .devcontainer/go-path
 .devcontainer/data
 .devcontainer/casdoor.pem