💥 Rename def-package! -> use-package!

Calling this pivotal macro "def-package!" has frequently been a source
of confusion. It is a thin wrapper around use-package, and it should be
obvious that it is so. For this reason, and to match the naming
convention used with other convenience macros/wrappers, it is now
use-package!.

Also changes def-package-hook! -> use-package-hook!

The old macros are now marked obsolete and will be removed when straight
integration is merged.

modules/lang/haskell/+dante.el

@@ -1,7 +1,7 @@
 ;;; lang/haskell/+dante.el -*- lexical-binding: t; -*-
 ;;;###if (featurep! +dante)
 
-(def-package! dante
+(use-package! dante
   :hook (haskell-mode-local-vars . dante-mode)
   :init
   (setq dante-load-flags '(;; defaults:

modules/lang/haskell/+intero.el

@@ -1,7 +1,7 @@
 ;;; lang/haskell/+intero.el -*- lexical-binding: t; -*-
 ;;;###if (featurep! +intero)
 
-(def-package! intero
+(use-package! intero
   :commands intero-mode
   :init
   (defun +haskell|init-intero ()

modules/lang/haskell/+lsp.el

@@ -1,6 +1,6 @@
 ;;; lang/haskell/+lsp.el -*- lexical-binding: t; -*-
 
-(def-package! lsp-haskell
+(use-package! lsp-haskell
   :after haskell-mode
   :init (add-hook 'haskell-mode-hook #'lsp!)
   :config