refactor: replace skill code with skill ID across the application

- Updated skill handling to use skill IDs instead of skill codes in various components, services, and models.
- Modified tests to reflect changes in skill identification.
- Removed references to skill codes in favor of skill IDs for consistency and clarity.
- Updated localization files to remove skill code references and adjust error messages accordingly.

internal/services/skill_runtime_service.go

@@ -24,7 +24,7 @@ func (s *skillRuntimeService) DebugRun(ctx context.Context, req request.SkillDeb
 	if req.AIAgentID <= 0 {
 		return nil, errorsx.InvalidParamI18n("error.e0061")
 	}
-	if strings.TrimSpace(req.SkillCode) == "" {
+	if req.SkillDefinitionID <= 0 {
 		return nil, errorsx.InvalidParamI18n("error.e0071")
 	}
 	if strings.TrimSpace(req.UserMessage) == "" {