[libshumate] docs: Add libshumate icon

[Corentin Noël <corentinnoel src gnome org>]

commit b614d90100ea659e9da6710c66de81c59b4e10c4
Author: James Westman <james jwestman net>
Date:   Tue Jan 18 16:04:49 2022 -0600

    docs: Add libshumate icon

 docs/libshumate-r.svg   | 32 ++++++++++++++++++++++++++++++++
 docs/libshumate.toml.in |  2 ++
 2 files changed, 34 insertions(+)
---
diff --git a/docs/libshumate-r.svg b/docs/libshumate-r.svg
new file mode 100644
index 0000000..05c1d59
--- /dev/null
+++ b/docs/libshumate-r.svg
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" version="1.1"
+     xmlns="http://www.w3.org/2000/svg";
+     xmlns:xlink="http://www.w3.org/1999/xlink";>
+  <defs>
+    <linearGradient id="Gradient" x1="0" x2="0" y1="0" y2="1">
+      <stop offset="0%" style="stop-color:#865E3C;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#986A44;stop-opacity:1" />
+    </linearGradient>
+    <filter id="alpha-to-white">
+      <feColorMatrix in="SourceGraphic" type="matrix"
+                     values="0 0 0 1 0
+                             0 0 0 1 0
+                             0 0 0 1 0
+                             0 0 0 1 0"/>
+    </filter>
+    <g id="child-svg">
+<svg height="16px" viewBox="0 0 16 16" width="16px" xmlns="http://www.w3.org/2000/svg";>
+    <path d="m 8.003906 0 c -2.210937 0 -4 1.789062 -4 4 c 0 0.378906 0.054688 0.75 0.164063 1.113281 l 
-0.007813 -0.003906 c 0.507813 1.882813 2.507813 4.226563 3.839844 5.558594 c 1.328125 -1.328125 3.316406 
-3.65625 3.835938 -5.53125 c 0.003906 -0.007813 0.007812 -0.015625 0.011718 -0.023438 c 0.101563 -0.363281 
0.15625 -0.738281 0.15625 -1.113281 c 0 -2.210938 -1.789062 -4 -4 -4 z m 0 2.667969 c 0.734375 -0.003907 
1.332032 0.59375 1.332032 1.332031 s -0.597657 1.335938 -1.332032 1.332031 c -0.738281 0.003907 -1.335937 
-0.59375 -1.335937 -1.332031 s 0.597656 -1.335938 1.335937 -1.332031 z m -2.519531 6.832031 c -0.175781 
0.003906 -0.347656 0.050781 -0.496094 0.144531 l -2.5 1.5 c -0.304687 0.179688 -0.488281 0.503907 -0.488281 
0.855469 s 0.183594 0.675781 0.488281 0.855469 l 5 3 c 0.3125 0.191406 0.710938 0.191406 1.027344 0 l 5 -3 c 
0.300781 -0.179688 0.484375 -0.503907 0.484375 -0.855469 s -0.183594 -0.675781 -0.484375 -0.855469 l -2.5 
-1.5 c -0.476563 -0.285156 -1.089844 -0.13
 2812 -1.371094 0.34375 c -0.285156 0.472657 -0.132812 1.085938 0.34375 1.367188 l 1.070313 0.644531 l 
-3.058594 1.832031 l -3.054688 -1.832031 l 1.070313 -0.644531 c 0.472656 -0.28125 0.625 -0.894531 0.34375 
-1.367188 c -0.136719 -0.230469 -0.359375 -0.394531 -0.617187 -0.457031 c -0.085938 -0.023438 -0.171876 
-0.03125 -0.257813 -0.03125 z m 0 0" fill="#2e3436"/>
+</svg>
+</g>
+  </defs>
+  <rect
+      width="256"
+      height="256"
+      fill="url(#Gradient)"
+      ry="128"
+      x="0"
+      y="0" />
+  <use xlink:href="#child-svg" filter="url(#alpha-to-white)"
+       transform="matrix(8,0,0,8,64,64)" />
+</svg>
diff --git a/docs/libshumate.toml.in b/docs/libshumate.toml.in
index 5f35807..3f52ecf 100644
--- a/docs/libshumate.toml.in
+++ b/docs/libshumate.toml.in
@@ -6,6 +6,7 @@ license = "LGPL-2.1-or-later"
 browse_url = "https://gitlab.gnome.org/GNOME/libshumate/";
 repository_url = "https://gitlab.gnome.org/GNOME/libshumate.git";
 website_url = "https://gnome.pages.gitlab.gnome.org/libshumate";
+logo_url = "libshumate-r.svg"
 dependencies = [
   "GObject-2.0",
   "Gtk-4.0",
@@ -39,5 +40,6 @@ urlmap_file = "urlmap.js"
 content_files = [
 ]
 content_images = [
+  "libshumate-r.svg",
 ]