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

squashfs-root/usr/share/icons/Humanity/actions/16/system-shutdown-panel.svg

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+<svg id="svg2403" width="16" height="16" version="1.0" xmlns="http://www.w3.org/2000/svg">
+ <path id="path3339" d="m5.195 4.1179c-4.65 2.4267-2.5473 9.3807 2.7688 9.3807 5.2607 0 7.6184-6.5927 2.7688-9.3807" style="fill:none;stroke-linecap:round;stroke-width:1.9;stroke:#606060"/>
+ <path id="path3341" d="m8 6.9952v-4.9904" style="fill:none;stroke-linecap:round;stroke-width:1.9;stroke:#606060"/>
+</svg>