💥 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/tools/debugger/config.el

@@ -20,7 +20,7 @@
 ;;
 ;;; Packages
 
-(def-package! dap-mode
+(use-package! dap-mode
   :when (featurep! :tools lsp)
   :hook (dap-mode . dap-ui-mode)
   :after lsp-mode
@@ -48,10 +48,10 @@
         (require 'dap-edge)))))
 
 
-(def-package! realgud
+(use-package! realgud
   :defer t
   :init
-  (def-package! realgud-trepan-ni
+  (use-package! realgud-trepan-ni
     :defer t
     :init (add-to-list '+debugger--realgud-alist
                        '(realgud:trepan-ni :modes (javascript-mode js2-mode js3-mode)