refactor: move mod tasks to their own subfolder

Makes the launcher/minecraft/mod/ folder a little more organized.

launcher/minecraft/mod/tasks/LocalModParseTask.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <QDebug>
+#include <QObject>
+#include <QRunnable>
+
+#include "minecraft/mod/Mod.h"
+#include "minecraft/mod/ModDetails.h"
+
+class LocalModParseTask : public QObject, public QRunnable
+{
+    Q_OBJECT
+public:
+    struct Result {
+        QString id;
+        std::shared_ptr<ModDetails> details;
+    };
+    using ResultPtr = std::shared_ptr<Result>;
+    ResultPtr result() const {
+        return m_result;
+    }
+
+    LocalModParseTask(int token, Mod::ModType type, const QFileInfo & modFile);
+    void run();
+
+signals:
+    void finished(int token);
+
+private:
+    void processAsZip();
+    void processAsFolder();
+    void processAsLitemod();
+
+private:
+    int m_token;
+    Mod::ModType m_type;
+    QFileInfo m_modFile;
+    ResultPtr m_result;
+};