feat: add mod update check tasks

Those tasks take a list of mods and check on the mod providers for
updates. They assume that the mods have metadata already.

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

launcher/modplatform/flame/FlameCheckUpdate.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "Application.h"
+#include "modplatform/CheckUpdateTask.h"
+#include "net/NetJob.h"
+
+class FlameCheckUpdate : public CheckUpdateTask {
+    Q_OBJECT
+
+   public:
+    FlameCheckUpdate(std::list<Mod>& mods, std::list<Version>& mcVersions, ModAPI::ModLoaderTypes loaders, std::shared_ptr<ModFolderModel> mods_folder)
+        : CheckUpdateTask(mods, mcVersions, loaders, mods_folder)
+    {}
+
+   public slots:
+    bool abort() override;
+
+   protected slots:
+    void executeTask() override;
+
+   private:
+    NetJob* m_net_job = nullptr;
+
+    bool m_was_aborted = false;
+};