feat(sddm,greetd): replace sddm with greetd regreet greeter

regreet/greetd/hyprland.conf

@@ -0,0 +1,9 @@
+exec-once = regreet; hyprctl dispatch exit
+input {
+    kb_layout = hu
+}
+misc {
+    disable_hyprland_logo = true
+    disable_splash_rendering = true
+    disable_hyprland_qtutils_check = true
+}