AO3 Re-read Savior: Bookmark tracker, Rekudos converter & Mark for Later+Subscribe buttons at BOP

Userscripts for an optimized and efficient AO3 experience, particularly rereading. This includes automatically populating bookmark notes with fic title, author, workID and summary alongside whatever existing bookmark notes. Also adds tags based on word count and fic completion status. Converts re-clicks of the Kudos button into a "rekudos" comment. Adds the "subscribe" and "mark for later/mark as read" buttons to the end of the fic.