feat(RD): add resource pack downloader

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/pages/modplatform/ResourcePackPage.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include "ui/pages/modplatform/ResourcePage.h"
+#include "ui/pages/modplatform/ResourcePackModel.h"
+
+namespace Ui {
+class ResourcePage;
+}
+
+namespace ResourceDownload {
+
+class ResourcePackDownloadDialog;
+
+class ResourcePackResourcePage : public ResourcePage {
+    Q_OBJECT
+
+   public:
+    template <typename T>
+    static T* create(ResourcePackDownloadDialog* dialog, BaseInstance& instance)
+    {
+        auto page = new T(dialog, instance);
+        auto model = static_cast<ResourcePackResourceModel*>(page->getModel());
+
+        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::updateVersionList);
+        connect(model, &ResourceModel::projectInfoUpdated, page, &ResourcePage::updateUi);
+
+        return page;
+    }
+
+    ~ResourcePackResourcePage() override = default;
+
+    //: The plural version of 'resource pack'
+    [[nodiscard]] inline QString resourcesString() const override { return tr("resource packs"); }
+    //: The singular version of 'resource packs'
+    [[nodiscard]] inline QString resourceString() const override { return tr("resource pack"); }
+
+    [[nodiscard]] bool supportsFiltering() const override { return false; };
+
+    [[nodiscard]] QMap<QString, QString> urlHandlers() const override;
+
+   protected:
+    ResourcePackResourcePage(ResourcePackDownloadDialog* dialog, BaseInstance& instance);
+
+   protected slots:
+    void triggerSearch() override;
+};
+
+}  // namespace ResourceDownload