refactoring, adding cli to edit config

cmd/cli/flag/flag.go

@@ -0,0 +1,18 @@
+package flag
+
+import (
+	"strings"
+)
+
+type Array []string
+
+// String is an implementation of the flag.Value interface
+func (i *Array) String() string {
+	return strings.Join(*i, ", ")
+}
+
+// Set is an implementation of the flag.Value interface
+func (i *Array) Set(value string) error {
+	*i = append(*i, value)
+	return nil
+}