Add with_std_json build tag

common/json/std.go

@@ -0,0 +1,20 @@
+//go:build with_std_json
+
+package json
+
+import "encoding/json"
+
+var (
+	Marshal    = json.Marshal
+	Unmarshal  = json.Unmarshal
+	NewEncoder = json.NewEncoder
+	NewDecoder = json.NewDecoder
+)
+
+type (
+	Encoder     = json.Encoder
+	Decoder     = json.Decoder
+	Token       = json.Token
+	Delim       = json.Delim
+	SyntaxError = json.SyntaxError
+)