Move avy, ace-link & ace-window out of core

They don't belong there, and ace-window is no longer a core dependency
anyhow.

modules/config/default/config.el

@@ -14,6 +14,11 @@
 ;;
 ;;; Reasonable defaults
 
+;;;###package avy
+(setq avy-all-windows nil
+      avy-background t)
+
+
 (after! epa
   (setq epa-file-encrypt-to
         (or epa-file-encrypt-to

modules/config/default/packages.el

@@ -1,6 +1,9 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; config/default/packages.el
 
+(package! avy)
+(package! ace-link)
+
 (unless (featurep! :editor evil)
   (package! winum)
   (package! expand-region))