feat(per-game): Add BasicSetting for Settings Sharing

Signed-off-by: Collecting <collecting@noreply.localhost>

src/citron/configuration/shared_widget.h

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -81,6 +82,9 @@ public:
      */
     bool Valid() const;
 
+    // Settings sharing
+    Settings::BasicSetting& GetSetting() { return setting; }
+
     /**
      * Creates a button to appear when a setting has been modified. This exists for custom
      * configurations and wasn't designed to work for the global configuration. It has public access