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

squashfs-root/usr/share/icons/ubuntu-mono-dark/status/16/applications-chat-panel.svg

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+<svg id="svg3795" width="18" height="16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+ <metadata id="metadata3800">
+  <rdf:RDF>
+   <cc:Work rdf:about="">
+    <dc:format>image/svg+xml</dc:format>
+    <dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/>
+    <dc:title/>
+   </cc:Work>
+  </rdf:RDF>
+ </metadata>
+ <g id="layer1">
+  <path id="path2396-2" d="m7.5 1c-4.14 0-7.5 3.36-7.5 7.5 0 4.14 3.36 7.5 7.5 7.5 1.9648 0 3.7561-0.76222 5.0938-2h5.4062l-3.3438-3.3438c0.20794-0.68762 0.34375-1.4011 0.34375-2.1562 0-4.14-3.36-7.5-7.5-7.5z" style="fill-rule:evenodd;opacity:.3"/>
+  <path id="path2396" d="m7.5 0c-4.14 0-7.5 3.36-7.5 7.5 0 4.14 3.36 7.5 7.5 7.5 1.9648 0 3.7561-0.76222 5.0938-2h5.4062l-3.3438-3.3438c0.20794-0.68762 0.34375-1.4011 0.34375-2.1562 0-4.14-3.36-7.5-7.5-7.5z" style="fill-rule:evenodd;fill:#dfdbd2"/>
+ </g>
+</svg>