tools/magit: map zt/zb motions in magit-mode

modules/tools/magit/config.el

@@ -174,7 +174,9 @@ ensure it is built when we actually use Forge."
   (evil-define-key* 'normal magit-status-mode-map [escape] nil) ; q is enough
   (evil-define-key* '(normal visual) magit-mode-map
     "%"  #'magit-gitflow-popup
+    "zt" #'evil-scroll-line-to-top
     "zz" #'evil-scroll-line-to-center
+    "zb" #'evil-scroll-line-to-bottom
     "g=" #'magit-diff-default-context)
   (define-key! 'normal
     (magit-status-mode-map