Update `set()` method to use CookieInit

[ayuishii]

Per recommendation from kenchris@ via TAG discussion

Change set() method to be as follows

Before

 Promise<void> set(USVString name, USVString value,
                    optional CookieStoreSetOptions options = {});
 Promise<void> set(CookieStoreSetExtraOptions options);

dictionary CookieStoreSetOptions {
  DOMTimeStamp? expires = null;
  USVString? domain = null;
  USVString path = "/";
  CookieSameSite sameSite = "strict";
};

dictionary CookieStoreSetExtraOptions : CookieStoreSetOptions {
  required USVString name;
  required USVString value;
};

After

  Promise<void> set(USVString name, USVString value);
  Promise<void> set(CookieListItemInit cookieListItemInit);

dictionary CookieListItemInit {
  required USVString name;
  USVString value;
  USVString? domain = null;
  USVString path = "/";
  DOMTimeStamp? expires = null;
  CookieSameSite sameSite = "strict";
};

[inexorabletash]

Maybe rename CookieListItemInit to just CookieInit ?

[ayuishii]

CookieInit SGTM 👍

[ayuishii]

Spec change and implementation complete, thanks!