explicitly load treemacs and treemacs-evil

without doing so, most of Treemacs' keybindings won't work

init.el

@@ -18,6 +18,9 @@
 (require 'evil)
 (evil-mode 1)
 
+(require 'treemacs)
+(require 'treemacs-evil)
+
 (setq-default indent-tabs-mode nil)
 
 (require 'evil-surround)