add remote cheats launcher

src/launcher/include/cheatFile.h

@@ -0,0 +1,26 @@
+#ifndef CHEAT_FILE_H
+#define CHEAT_FILE_H
+
+#include <QByteArray>
+#include <QJsonDocument>
+#include <QList>
+#include <QString>
+
+namespace Cheats {
+
+[[nodiscard]] bool    IsSupportedTitleId(const QString& title_id);
+[[nodiscard]] QString PlanPath(const QString& title_id);
+
+// Local files retain their existing defaults; remote imports receive additional validation.
+[[nodiscard]] QString       ParseDocument(const QByteArray& data, QJsonDocument* document);
+[[nodiscard]] QString       ValidateImport(const QJsonDocument& document, const QString& title_id,
+                                           const QString& version, const QString& process);
+[[nodiscard]] QJsonDocument WithSelection(const QJsonDocument& document,
+                                          const QList<bool>&   enabled);
+// Refuse to replace a file changed since it was loaded; empty data also permits creation.
+[[nodiscard]] QString SaveDocument(const QString& path, const QJsonDocument& document,
+                                   const QByteArray& expected_data);
+
+} // namespace Cheats
+
+#endif // CHEAT_FILE_H