Replace terminal and file manager in Budgie profile (#4533)

I think it was a mistake to have made the previous changes to KDE Apps. In retrospect, it seemed like a good idea since the Budgie developer had done it that way in Fedora, which is the distro the developer uses as a reference for Budgie. When you start using it, you realize there's no bridge between the desktop and the KDE Apps, and things like Dolphin recognizes icons and themes, requiring some rather annoying manual configurations. Then, if you want to change them again, you have to change those configurations again. Files don't open by default with the apps either; you have to configure them for that to work.

At first, I thought the Budgie packager for Arch had forgotten some stray dependency, but with some free time, I tested it with Fedora 44, and to my surprise, it has exactly the same problems, which is completely unacceptable for a final stable release. I suppose he'll make the necessary changes in the near future, but right now, it's a disaster.

archinstall/default_profiles/desktops/budgie.py

@@ -18,12 +18,13 @@ class BudgieProfile(Profile):
 		return [
 			'materia-gtk-theme',
 			'budgie',
-			'konsole',
-			'dolphin',
+			'mate-terminal',
+			'nemo',
+			'nemo-fileroller',
 			'papirus-icon-theme',
 		]
 
 	@property
 	@override
 	def default_greeter_type(self) -> GreeterType:
-		return GreeterType.Sddm
+		return GreeterType.LightdmSlick