Rewrite switch-{buffer,window} hooks

+ Add doom-switch-frame-hook
+ Replace doom-{enter,exit}-{buffer,window}-hook with
  doom-switch-{buffer,window}-hook
+ New switch-buffer hooks run on buffer-list-update-hook rather than
  in select-window advice.
+ Blank our buffer-list-update-hook in some places to reduce how many
  times it gets triggered.

modules/ui/nav-flash/config.el

@@ -11,7 +11,7 @@
   ;; NOTE In :feature lookup `recenter' is hooked to a bunch of jumping
   ;; commands, which will trigger nav-flash.
   (add-hook!
-    '(doom-enter-window-hook
+    '(doom-switch-window-hook
       imenu-after-jump-hook evil-jumps-post-jump-hook
       counsel-grep-post-action-hook dumb-jump-after-jump-hook)
     #'+nav-flash|blink-cursor-maybe)