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/ResourcePackFolderModel.h

@@ -2,9 +2,13 @@
 
 #include "ResourceFolderModel.h"
 
+#include "ResourcePack.h"
+
 class ResourcePackFolderModel : public ResourceFolderModel
 {
     Q_OBJECT
 public:
     explicit ResourcePackFolderModel(const QString &dir);
+
+    RESOURCE_HELPERS(ResourcePack)
 };