feat:add github_copilot to providers factory

pkg/providers/http_provider.go

@@ -314,7 +314,17 @@ func CreateProvider(cfg *config.Config) (LLMProvider, error) {
 					model = "deepseek-chat"
 				}
 			}
+		case "github_copilot", "copilot":
+			if cfg.Providers.GitHubCopilot.APIBase != "" {
+				apiBase = cfg.Providers.GitHubCopilot.APIBase
+			}else {
+				apiBase = "localhost:4321"   // no `http://`  beacause grpc mode`
+ 			}
+			return NewGitHubCopilotProvider(apiBase, cfg.Providers.GitHubCopilot.ConnectMode, model), nil
+			
 		}
+		
+
 	}
 
 	// Fallback: detect provider from model name