Add Telegram::Bot::Api#file

[JuanKman94]

This method can be used to download media after calling #getFile

Usage

# Select second tallest photo
def select_photo_by_height(notification)
  photos = notification.photo.sort_by(&:height)
  photos[-2]
end

client = ::Telegram::Bot::Client.new(ENV["bot_token"])
photo = select_photo_by_height(notification)
resp = client.api.get_file(file_id: photo.file_id)
raise "Invalid response from telegram: #{JSON.dump(resp)}" unless resp["ok"]

data = client.api.file(resp.dig("result", "file_path")) # binary data

[github-actions[bot]]

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[JuanKman94]

@atipugin have you had a chance to look at this? IMO the benefit of having this method is we avoid the boilerplate of opening a new HTTP connection to telegram

[github-actions[bot]]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days.