Support for sorting parameters

[peterhartman]

Is your feature request related to a problem? Please describe.
The only sorting supported by this wrapper currently is :runtime_sort? which may be inefficient if the sorting is supported by the API.

Describe the solution you'd like
The ability to define and use sort_with and order_with properties in the endpoint definition

Describe alternatives you've considered
Currently I am using :runtime_sort?

Express the feature either with a change to resource syntax, or with a change to the resource interface

endpoint :list_users do
  path("/users")
  limit_with {:param, "limit"}
  sort_with {:param, "sortBy"}
  order_with {:param, "order"}
  # runtime_sort? true
  paginator CustomPaginator
end

[zachdaniel]

I think we may want to go with the same strategy we've used for paginator as it allows for more complex behaviors. We should probably do that for limit too, TBH. i.e limiter {LimitParam, "limit"}, sorter {SortParam, ...}. Because some apis support things like sort=foo,-bar,+baz and some require providing the parameter multiple times, or splitting the order and the sort params.