bring to ECMA something like tags concept from golang struct

would be nice to have something like golang struct tags on ECMA

examples

class User {
  firstName: String `column-name:first_name `required `column-type:text
  password: String `json:-
} `table-name:users `sql-driver:mysql

const user = {
  firstName: someVarValue `required
}

Related: GitHub - tc39/proposal-decorator-metadata