Refactor!

create sub packages
delete unused code
delete code from not use command cmdRouter,cmdTest, cmdRundocs
make command plugins
check with gosimple,staticcheck,go vet,unused,unconvert

utils/str_flag.go

@@ -0,0 +1,15 @@
+package utils
+
+import "fmt"
+
+// The string flag list, implemented flag.Value interface
+type StrFlags []string
+
+func (s *StrFlags) String() string {
+	return fmt.Sprintf("%s", *s)
+}
+
+func (s *StrFlags) Set(value string) error {
+	*s = append(*s, value)
+	return nil
+}