feat: Keep eln-cache out of my config directory.

For early-init reasons, we had to split part of syd-prelude.el out into a new
file, syd-constants.el.

users/crumb/programs/emacs/init.el

@@ -9,7 +9,9 @@
 ;; Personal modules.
 
 (add-to-list 'load-path (file-name-concat user-emacs-directory "modules"))
-(add-to-list 'load-path (file-name-concat user-emacs-directory "lib"))
+
+;; Must come before the rest!
+(require 'syd-use-package)
 
 (require 'syd-age)
 (require 'syd-autosave)