💥 revise hook/var fns naming convention (2/2)

This is second of three big naming convention changes. In this commit,
we change the naming conventions for hook functions and variable
functions:

1. Replace the bar | to indicate a hook function with a -h suffix, e.g.

     doom|init-ui -> doom-init-ui-h
     doom|run-local-var-hooks -> doom-run-local-var-hooks-h

2. And add a -fn suffix for functions meant to be set on variables,
   e.g.

     (setq magit-display-buffer-function #'+magit-display-buffer-fn)

See ccf327f8 for the reasoning behind these changes.

modules/config/literate/autoload.el

@@ -4,7 +4,7 @@
 (defalias '+literate/reload #'doom/reload)
 
 ;;;###autoload
-(defun +literate|recompile-maybe ()
+(defun +literate-recompile-maybe-h ()
   "Recompile config.org if we're editing an org file in our DOOMDIR.
 
 We assume any org file in `doom-private-dir' is connected to your literate