refactor: use std::filesystem::rename insted of copy and then moving.

Signed-off-by: Rachel Powers <508861+Ryex@users.noreply.github.com>

launcher/FileSystem.h

@@ -121,6 +121,14 @@ class copy : public QObject {
     int m_copied;
 };
 
+/**
+ * @brief moves a file by renaming it
+ * @param source source file path
+ * @param dest destination filepath
+ * 
+ */
+bool move(const QString&  source, const QString& dest);
+
 /**
  * Delete a folder recursively
  */