Basic, unfinished & broken impl

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

launcher/ui/dialogs/InstallLoaderDialog.h

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (C) 2022 TheKodeToad <TheKodeToad@proton.me>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QDialog>
+#include "ui/pages/BasePageProvider.h"
+
+class MinecraftInstance;
+class PageContainer;
+class PackProfile;
+
+class InstallLoaderDialog : public QDialog, public BasePageProvider {
+    Q_OBJECT
+
+   public:
+    explicit InstallLoaderDialog(std::shared_ptr<PackProfile> instance, QWidget* parent = nullptr);
+
+    QList<BasePage*> getPages() override;
+    QString dialogTitle() override;
+
+    void done(int result) override;
+
+   private:
+    std::shared_ptr<PackProfile> m_profile;
+    PageContainer* m_container;
+};