Add feature to extractPage to also dump the extracted page to json/csv/txt

[BwandoWando]

Thank you for your tool, I've tried using it as seen below

Can you please add a feature in the extractPage py to also have the capability to dump the extracted text into a json/csv/txt, and even have the option to remove all markups and html and just get the text of the page?

Also, is it possible to submit multiple Ids at once rather than one by one? Thank you and more power!