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/TexturePackModel.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "meta/VersionList.h"
+#include "ui/pages/modplatform/ResourcePackModel.h"
+
+namespace ResourceDownload {
+
+class TexturePackResourceModel : public ResourcePackResourceModel {
+    Q_OBJECT
+
+   public:
+    TexturePackResourceModel(BaseInstance const& inst, ResourceAPI* api);
+
+    [[nodiscard]] inline ::Version maximumTexturePackVersion() const { return { "1.6" }; }
+
+    ResourceAPI::SearchArgs createSearchArguments() override;
+    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override;
+
+   protected:
+    Meta::VersionList::Ptr m_version_list;
+};
+
+}  // namespace ResourceDownload