feat(RD): add texture pack downloader

This extends the resource pack downloader, with the custom behavior of
filtering the versions that shows up, to those <= 1.6. As always, Flame
is funky and requires a bit more workarounds than average.

This will also get a nice improvement when the Version parsing and
comparison PR gets merged! :D

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

launcher/ui/pages/modplatform/TexturePackPage.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include "ui_ResourcePage.h"
+#include "ui/dialogs/ResourceDownloadDialog.h"
+#include "ui/pages/modplatform/ResourcePackPage.h"
+#include "ui/pages/modplatform/TexturePackModel.h"
+
+namespace Ui {
+class ResourcePage;
+}
+
+namespace ResourceDownload {
+
+class TexturePackDownloadDialog;
+
+class TexturePackResourcePage : public ResourcePackResourcePage {
+    Q_OBJECT
+
+   public:
+    template <typename T>
+    static T* create(TexturePackDownloadDialog* dialog, BaseInstance& instance)
+    {
+        auto page = new T(dialog, instance);
+        auto model = static_cast<TexturePackResourceModel*>(page->getModel());
+
+        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::updateVersionList);
+        connect(model, &ResourceModel::projectInfoUpdated, page, &ResourcePage::updateUi);
+
+        return page;
+    }
+
+    //: The plural version of 'texture pack'
+    [[nodiscard]] inline QString resourcesString() const override { return tr("texture packs"); }
+    //: The singular version of 'texture packs'
+    [[nodiscard]] inline QString resourceString() const override { return tr("texture pack"); }
+
+   protected:
+    TexturePackResourcePage(TexturePackDownloadDialog* dialog, BaseInstance& instance)
+        : ResourcePackResourcePage(dialog, instance)
+    {
+        connect(m_ui->searchButton, &QPushButton::clicked, this, &TexturePackResourcePage::triggerSearch);
+        connect(m_ui->packView, &QListView::doubleClicked, this, &TexturePackResourcePage::onResourceSelected);
+    }
+};
+
+}  // namespace ResourceDownload