Add map with all methods, params and responses

[fedorov-xyz]

export type RequestMap = {
  'groups.get': {
    params: GroupsGetParams;
    response: GroupsGetResponse | GroupsGetExtendedResponse;
  };
  'friends.get': {
    params: FriendsGetParams;
    response: FriendsGetResponse | FriendsGetFieldsResponse;
  };
}