feat: add gen enum command

pkg/utils/generator/embedded_1.16.go

@@ -0,0 +1,16 @@
+//go:build go1.16
+// +build go1.16
+
+package generator
+
+import (
+	"embed"
+	"text/template"
+)
+
+//go:embed enum.tmpl enum_string.tmpl
+var content embed.FS
+
+func (g *Generator) addEmbeddedTemplates() {
+	g.t = template.Must(g.t.ParseFS(content, "*.tmpl"))
+}