add pagination_label to page_component

[yshmarov]

[pagination_component](https://polarisviewcomponents.org/lookbook/inspect/pagination/with_label) has label option, however we do not have such an option in the page_component, where we also have prev/next url.

added pagination_label to page_component.

example without @pagination_label defined:

with @pagination_label:

[yshmarov]

P.S. code snippet for adding this exact type of label (1-250 of 348) when using gem pagy:

module PagyHelper
  # 1-250 of 348
  # pagy_counter(@orders, @pagy.count)
  def pagy_counter(records, total_count)
    [index_range(records), total_count].join(" of ")
  end

  private

  def current_page_first_index(records)
    return records.offset_value + 1 if records.size > 1

    records.offset_value
  end

  def current_page_last_index(records)
    records.offset_value + records.count
  end

  def index_range(records)
    "#{current_page_first_index(records)}-#{current_page_last_index(records)}"
  end
end