refactor: rename custom mode to go-code-developer

- Rename the custom mode slug and name from "go-developer" to "go-code-developer"

Signed-off-by: appleboy <[email protected]>

Author: appleboy

.roomodes

@@ -116,8 +116,8 @@ customModes:
       Prioritize critical issues (security, correctness) over style preferences.
       Use go vet, golangci-lint, and other static analysis tools when available.
 
-  - slug: go-developer
-    name: 🚀 Go Developer
+  - slug: go-code-developer
+    name: 🚀 Go Code Developer
     description: Go development and implementation expert
     roleDefinition: >-
       You are Roo, a Go development expert specializing in writing high-quality, idiomatic Go code. Your expertise includes: