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

squashfs-root/usr/share/icons/Adwaita/symbolic/status/network-cellular-disabled-symbolic.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg height="16px" viewBox="0 0 16 16" width="16px" xmlns="http://www.w3.org/2000/svg">
+    <path d="m 1.53125 0.46875 l -1.0625 1.0625 l 14 14 l 1.0625 -1.0625 l -0.53125 -0.53125 v -11.9375 c 0 -0.554688 -0.445312 -1 -1 -1 h -1 c -0.554688 0 -1 0.445312 -1 1 v 8.9375 l -1 -1 v -4.9375 c 0 -0.554688 -0.445312 -1 -1 -1 h -1 c -0.554688 0 -1 0.445312 -1 1 v 1.9375 z m 2.730469 6.855469 c -0.160157 0.179687 -0.261719 0.414062 -0.261719 0.675781 v 6 c 0 0.554688 0.445312 1 1 1 h 1 c 0.554688 0 1 -0.445312 1 -1 v -3.9375 z m -3.261719 2.675781 c -0.554688 0 -1 0.445312 -1 1 v 3 c 0 0.554688 0.445312 1 1 1 h 1 c 0.554688 0 1 -0.445312 1 -1 v -3 c 0 -0.554688 -0.445312 -1 -1 -1 z m 7 1.0625 v 2.9375 c 0 0.554688 0.445312 1 1 1 h 1 c 0.535156 0 0.964844 -0.414062 0.996094 -0.941406 z m 0 0" fill="#2e3434"/>
+</svg>