Add an option to import games automatically (#302)

data/gtk/preferences.blp

@@ -61,6 +61,10 @@ template $CartridgesPreferences: Adw.PreferencesDialog {
     Adw.PreferencesGroup import_behavior_group {
       title: _("Behavior");
 
+      Adw.SwitchRow auto_import_switch {
+        title: _("Import Games Automatically");
+      }
+
       Adw.SwitchRow remove_missing_switch {
         title: _("Remove Uninstalled Games");
       }

data/page.kramo.Cartridges.gschema.xml.in

@@ -2,6 +2,9 @@
 <schemalist gettext-domain="cartridges">
 
   <schema id="@APP_ID@" path="@PREFIX@/">
+    <key name="auto-import" type="b">
+        <default>false</default>
+    </key>
     <key name="exit-after-launch" type="b">
       <default>false</default>
     </key>