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

squashfs-root/usr/share/icons/Adwaita/symbolic/actions/object-flip-vertical-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 13 5 c 0 -0.265625 -0.105469 -0.519531 -0.292969 -0.707031 l -4 -4 c -0.390625 -0.3906252 -1.023437 -0.3906252 -1.414062 0 l -4 4 c -0.390625 0.390625 -0.390625 1.023437 0 1.414062 s 1.023437 0.390625 1.414062 0 l 2.292969 -2.292969 v 9.171876 l -2.292969 -2.292969 c -0.390625 -0.390625 -1.023437 -0.390625 -1.414062 0 s -0.390625 1.023437 0 1.414062 l 4 4 c 0.390625 0.390625 1.023437 0.390625 1.414062 0 l 4 -4 c 0.1875 -0.1875 0.292969 -0.441406 0.292969 -0.707031 s -0.105469 -0.519531 -0.292969 -0.707031 c -0.390625 -0.390625 -1.023437 -0.390625 -1.414062 0 l -2.292969 2.292969 v -9.171876 l 2.292969 2.292969 c 0.390625 0.390625 1.023437 0.390625 1.414062 0 c 0.1875 -0.1875 0.292969 -0.441406 0.292969 -0.707031 z m 0 0" fill="#2e3436"/>
+</svg>