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

squashfs-root/usr/share/glib-2.0/schemas/org.gtk.gtk4.Settings.Debug.gschema.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist>
+
+  <schema id='org.gtk.gtk4.Settings.Debug' path='/org/gtk/gtk4/settings/debug/'>
+    <key name='enable-inspector-keybinding' type='b'>
+      <default>true</default>
+      <summary>Enable inspector keybinding</summary>
+      <description>
+        If this setting is true, GTK lets the user open an interactive
+        debugging window with a keybinding. The default shortcuts for
+        the keybinding are Control-Shift-I and Control-Shift-D.
+      </description>
+    </key>
+    <key name='inspector-warning' type='b'>
+      <default>true</default>
+      <summary>Inspector warning</summary>
+      <description>
+        If this setting is true, GTK shows a warning before letting
+        the user use the interactive debugger.
+      </description>
+    </key>
+  </schema>
+
+</schemalist>
+