Use emacs-pgtk as the emacs package to support Wayland

I'm trying out wayland and want to be able to run Emacs without resorting to
Xwayland because the compositor I'm trying out doesn't work with it.

oni/home/config/data.scm

@@ -4,7 +4,7 @@
   #:use-module (gnu home)
   #:use-module (gnu packages admin)
   #:use-module ((gnu packages emacs)
-                #:select (emacs))
+                #:select (emacs-pgtk))
   #:use-module ((gnu packages emacs-xyz)
                 #:select (emacs-guix
                           emacs-org-contacts))
@@ -128,7 +128,7 @@
                  emacs-outli
                  emacs-guix
 
-                 (emacs-oni-org-roam emacs)
+                 (emacs-oni-org-roam emacs-pgtk)
                  emacs-oni-vterm
                  emacs-oni-elisp
                  emacs-oni-core
@@ -288,6 +288,7 @@
 
    (service home-emacs-service-type
             (home-emacs-configuration
+             (package emacs-pgtk)
              (configurations
               (list
                (local-file "../services/emacs/init.el")