Replace :eval/:repl with autodef functions

+ :eval => set-eval-handler!
+ :repl => set-repl-handler!
+ Updates all internal references.

modules/lang/ess/config.el

@@ -39,7 +39,7 @@
         ess-nuke-trailing-whitespace-p t
         ess-default-style 'DEFAULT)
   (ess-toggle-underscore t)
-  (set! :repl 'ess-mode #'+ess/r-repl)
+  (set-repl-handler! 'ess-mode #'+ess/r-repl)
   (set! :lookup 'ess-mode :documentation #'ess-display-help-on-object)
   (define-key! ess-doc-map
     "h" #'ess-display-help-on-object