fix readme repo diagram, add agents.md

linux/gsettings/org.rssuper.app.settings.gschema.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist>
+    <schema id="org.rssuper.app.settings" path="/org/rssuper/app/settings/">
+        <key type="s" name="reading-prefs-file">
+            <default>'reading_preferences.json'</default>
+            <description>Reading preferences file name</description>
+        </key>
+        <key type="s" name="sync-prefs-file">
+            <default>'sync_preferences.json'</default>
+            <description>Sync preferences file name</description>
+        </key>
+        <key type="b" name="background-sync-enabled">
+            <default>false</default>
+            <description>Enable background sync</description>
+        </key>
+        <key type="i" name="sync-interval-minutes">
+            <default>15</default>
+            <description>Sync interval in minutes</description>
+        </key>
+    </schema>
+</schemalist>