Feature Request -- Allow for download of Pearson/Sanoma Libri Liquidi Digitali.

[Fabio53443]

Title! It should be pretty easy, given that the infrastructure for authentication management is basically the same as for eTexts etc. Books are in links like this:https://mediaserver.pearsonitalia.it/2021/read/PR0395001789VA_filesist1A/090_05_chapter.xhtml with the name of the file incrementing. The files could then be ported over to markdown with the python equivalent of Readability.js. I currently set up a macro that uses the MarkDownload extension and it works ok.