move import to bottom (#917)

default/walker/themes/omarchy-default.css

@@ -1,5 +1,3 @@
-@import url("file://~/.config/omarchy/current/theme/walker.css");
-
 /* Reset all elements */
 #window,
 #box,
@@ -168,3 +166,4 @@ scrollbar {
   opacity: 0;
 }
 
+@import url("file://~/.config/omarchy/current/theme/walker.css");