Integrate swaybg and swayosd into the new shell

default/themed/swayosd.css.tpl

@@ -1,5 +0,0 @@
-@define-color background-color {{ background }};
-@define-color border-color {{ foreground }};
-@define-color label {{ foreground }};
-@define-color image {{ foreground }};
-@define-color progress {{ accent }};