feat: init scaffold

internal/builtin/scaffold.go

@@ -0,0 +1,17 @@
+package builtin
+
+import (
+	"fmt"
+
+	"github.com/httprunner/hrp/internal/ga"
+)
+
+func CreateScaffold(projectName string) error {
+	// report event
+	ga.SendEvent(ga.EventTracking{
+		Category: "Scaffold",
+		Action:   "hrp startproject",
+	})
+
+	return fmt.Errorf("not implemented")
+}