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

squashfs-root/usr/share/icons/Adwaita/symbolic/actions/document-save-as-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 4.5 0 c -0.277344 0 -0.5 0.222656 -0.5 0.5 v 1 c 0 0.277344 0.222656 0.5 0.5 0.5 h 1 c 0.277344 0 0.5 -0.222656 0.5 -0.5 v -1 c 0 -0.277344 -0.222656 -0.5 -0.5 -0.5 z m 3 0 c -0.277344 0 -0.5 0.222656 -0.5 0.5 v 1 c 0 0.277344 0.222656 0.5 0.5 0.5 h 1 c 0.277344 0 0.5 -0.222656 0.5 -0.5 v -1 c 0 -0.277344 -0.222656 -0.5 -0.5 -0.5 z m 3 0 c -0.277344 0 -0.5 0.222656 -0.5 0.5 v 1 c 0 0.277344 0.222656 0.5 0.5 0.5 h 1 c 0.277344 0 0.5 -0.222656 0.5 -0.5 v -1 c 0 -0.277344 -0.222656 -0.5 -0.5 -0.5 z m -3.5 3 v 6.585938 l -1.292969 -1.292969 c -0.1875 -0.1875 -0.441406 -0.292969 -0.707031 -0.292969 s -0.519531 0.105469 -0.707031 0.292969 c -0.390625 0.390625 -0.390625 1.023437 0 1.414062 l 3 3 c 0.390625 0.390625 1.023437 0.390625 1.414062 0 l 3 -3 c 0.390625 -0.390625 0.390625 -1.023437 0 -1.414062 s -1.023437 -0.390625 -1.414062 0 l -1.292969 1.292969 v -6.585938 z m -6 11 v 2 h 14 v -2 z m 0 0" fill="#2e3436"/>
+</svg>