💥 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/go/config.el

@@ -53,11 +53,11 @@
           "n" #'+go/test-nested)))
 
 
-(def-package! gorepl-mode
+(use-package! gorepl-mode
   :commands gorepl-run-load-current-file)
 
 
-(def-package! company-go
+(use-package! company-go
   :when (and (featurep! :completion company)
              (not (featurep! +lsp)))
   :after go-mode