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

squashfs-root/usr/share/icons/Adwaita/symbolic/status/audio-volume-overamplified-symbolic-rtl.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 9 1.007812 c 0.296875 -0.003906 0.578125 0.125 0.769531 0.351563 l 3.230469 3.640625 h 1 c 1.09375 0 2 0.84375 2 2 v 2 c 0 1.089844 -0.910156 2 -2 2 h -1 l -3.230469 3.640625 c -0.210937 0.253906 -0.492187 0.363281 -0.769531 0.359375 z m -7 -0.007812 c 0.550781 0 1 0.449219 1 1 v 12 c 0 0.550781 -0.449219 1 -1 1 s -1 -0.449219 -1 -1 v -12 c 0 -0.550781 0.449219 -1 1 -1 z m 4 2 c 0.550781 0 1 0.449219 1 1 v 8 c 0 0.550781 -0.449219 1 -1 1 s -1 -0.449219 -1 -1 v -8 c 0 -0.550781 0.449219 -1 1 -1 z m 0 0" fill="#2e3436"/>
+</svg>