feat: add various system and theme icons, configuration files, and support assets

squashfs-root/usr/share/X11/xkb/symbols/au

@@ -0,0 +1,9 @@
+// Keyboard layout for Australia.
+
+// The default Australian layout is the same as the American.
+default partial alphanumeric_keys
+xkb_symbols "basic" {
+    include "us(basic)"
+
+    name[Group1]= "English (Australia)";
+};