refactor(RD): decouple ResourceModels from ResourcePages

This makes it so that we don't need a reference to the parent page in
the model. It will be useful once we change the page from a widget-based
one to a QML page.

It also makes tasks be created in the dialog instead of the page, so
that the dialog can also have the necessary information to mark versions
as selected / deselected easily. It also makes the task pointers into
smart pointers.

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

launcher/modplatform/flame/FlameAPI.h

@@ -78,7 +78,7 @@ class FlameAPI : public NetworkResourceAPI {
 
     [[nodiscard]] std::optional<QString> getVersionsURL(VersionSearchArgs const& args) const override
     {
-        QString url{QString("https://api.curseforge.com/v1/mods/%1/files?pageSize=10000&").arg(args.addonId)};
+        QString url{QString("https://api.curseforge.com/v1/mods/%1/files?pageSize=10000&").arg(args.pack.addonId.toString())};
 
         QStringList get_parameters;
         if (args.mcVersions.has_value())