refactor: adapt rest of the codebase to the new resource model

In order to access the ModFolderModel from the ModFolderPage, i created
a new m_model for the correct type, shadowing the m_model of type
ResourceFolderModel. This creates two shared_ptr references to the same object,
but since they will have the same lifetime, it doesn't generate a memory
leak.

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

launcher/minecraft/mod/ResourcePack.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "Resource.h"
+
+class ResourcePack : public Resource {
+    Q_OBJECT
+    public:
+    using Ptr = shared_qobject_ptr<Resource>;
+
+    ResourcePack(QObject* parent = nullptr) : Resource(parent) {}
+    ResourcePack(QFileInfo file_info) : Resource(file_info) {}
+
+};