Add ECMAScript standard library

[arhadthedev]

Unlike runtime extensions from #64, standard library modules export not integrate(targetGlobalThis) but way lower-level integrate(globalEnvironmentRecord) inaccessible for the extensions.

Example of the function for ECMA-402 (internationalization API specification):

export function integrate(globalEnvironmentRecord) {
  const Intl = {
    Collator: function(locales = undefined, options = undefined) {
      // ...
    }
  };
  targetGlobalObject.Intl = Intl;
}