Move pdf-tools config to +ui

+ui.el

@@ -6,9 +6,10 @@
 ;; Display Magit status in fullscreen
 (after! magit
   (setq magit-display-buffer-function #'magit-display-buffer-fullframe-status-v1))
-;; Match pdf-tools colors to the theme
+;; Match pdf-tools colors to the theme and fit to page by default
 (after! pdf-tools
   (setq pdf-view-midnight-colors '("#ECEFF4" . "#2E3440"))
+  (setq-default pdf-view-display-size 'fit-width)
   (add-hook 'pdf-tools-enabled-hook 'pdf-view-midnight-minor-mode))
 ;; Customize modeline
 (setq doom-modeline-major-mode-icon t