New interface to Typer: the function TypeName() returns a more readable type name

operand-dict.go

@@ -90,6 +90,14 @@ func (dict *DictType) ToString(opt FmtOpt) string {
 	return sb.String()
 }
 
+func (dict *DictType) String() string {
+	return dict.ToString(0)
+}
+
+func (dict *DictType) TypeName() string {
+	return "dict"
+}
+
 func (dict *DictType) hasKey(target any) (ok bool) {
 	for key := range *dict {
 		if ok = reflect.DeepEqual(key, target); ok {