Feature Request: Add Support filters and search in count_ functions

[rafaelofreitas]

Change the count_my_schemas function, to receive search and filter parameters.

  def count_my_schemas(field \\ :id) do
    Repo.aggregate(MySchema, :count, field)
  end

Something like that:

 def count_my_schemas(params \\ %{}) do
   search = params[:search]
   search_fields = params[:search_fields] || []
   filters = params[:filters] || %{}

   MySchema
   |> Crudry.Query.search(search, search_fields)
   |> Crudry.Query.filter(filters)
   |> Repo.count()
 end

[gabrielpra1]

Sounds good!

Small thing: there's no Repo.count function, and I think we should still accept the field to be counted as argument