[gnome] Add new extensions

gnome/.local/share/gnome-shell/extensions/snapshell@unbl.ink/schemas/org.gnome.shell.extensions.snapshell.gschema.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist>
+  <schema id="org.gnome.shell.extensions.snapshell"
+          path="/org/gnome/shell/extensions/snapshell/">
+
+    <key name="server-url" type="s">
+      <default>'https://snap.unbl.ink/jsonrpc'</default>
+      <summary>Snapcast JSON-RPC URL</summary>
+      <description>
+        HTTP(S) endpoint for Snapserver JSON-RPC.
+      </description>
+    </key>
+
+    <key name="group-id" type="s">
+      <default>'a16be8ca-e36f-5498-08cd-3879f2025775'</default>
+      <summary>Snapcast group id</summary>
+      <description>
+        UUID of the Snapcast group to control by default.
+      </description>
+    </key>
+
+    <key name="poll-seconds" type="u">
+      <default>5</default>
+      <summary>Polling interval (seconds)</summary>
+      <description>
+        How often to refresh Server.GetStatus to update slider position.
+      </description>
+    </key>
+
+  </schema>
+</schemalist>