User Data Migration from Citron, Sudachi, and Yuzu (#91)

Includes citron, sudachi, yuzu

currently broken, because the eden dir is always made early?

Signed-off-by: swurl <swurl@swurl.xyz>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/91
Co-authored-by: swurl <swurl@swurl.xyz>
Co-committed-by: swurl <swurl@swurl.xyz>

src/yuzu/user_data_migration.h

@@ -0,0 +1,27 @@
+// Copyright Citra Emulator Project / Azahar Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// SPDX-FileCopyrightText: Copyright 2025 eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QMainWindow>
+
+class UserDataMigrator {
+public:
+    UserDataMigrator(QMainWindow* main_window);
+
+private:
+    enum class LegacyEmu {
+        Citron,
+        Sudachi,
+        Yuzu,
+        Suyu,
+    };
+
+    void ShowMigrationPrompt(QMainWindow* main_window);
+    void ShowMigrationCancelledMessage(QMainWindow* main_window);
+    void MigrateUserData(QMainWindow* main_window, const LegacyEmu selected_legacy_emu, const bool clear_shader_cache);
+};