[Feature] Store last paragraph index when the test option is "Book Paragraphs"

[sha-N]

Under "Typing Test" -> “Settings” when the test option is selected as "Book Paragraphs", it would be helpful to store the last position of the book rather than restarting from the beginning of the book every time. This can be the default behavior, or a checkbox can be provided in the setting to facilitate this.

[ColdCactus]

Yes, that would indeed be most welcome ♥️ Of course I can manually skip through the paragraphs, but it takes a while because the units rarely line up with sentences or even paragraphs.