Make sync scrolling work with `pixel-scroll-precision-mode`

[alcarney]

;; TODO: `window-scroll-functions' are not called when scrolling
;; via `pixel-scroll-precision-mode'.  As far as I can tell this
;; was reported but not fixed?
;; https://mail.gnu.org/archive/html/bug-gnu-emacs/2023-02/msg00357.html
(add-hook 'window-scroll-functions 'esbonio--window-scrolled)