feat(wpcarro/emacs): Add fns to list.el

new functions:
- duplicate
- last
- delete
- wrap

also:
- drop support for `list-head` (in favor of `list-first`)
- add optional arg to first

Change-Id: If3c48d4749a3bc5a853995996fa02a65a4076a10
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6041
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI

users/wpcarro/emacs/.emacs.d/wpc/irc.el

@@ -106,7 +106,7 @@
   (let ((buffers (erc-buffer-list)))
     (if (list-empty? buffers)
         (error "[irc.el] No ERC buffers available")
-      (switch-to-buffer (list-head (erc-buffer-list))))))
+      (switch-to-buffer (list-first (erc-buffer-list))))))
 
 (defun irc-connect-to-freenode ()
   "Connect to Freenode IRC."