Add offline mode support

launcher/minecraft/auth/flows/Offline.cpp

@@ -0,0 +1,17 @@
+#include "Offline.h"
+
+#include "minecraft/auth/steps/OfflineStep.h"
+
+OfflineRefresh::OfflineRefresh(
+    AccountData *data,
+    QObject *parent
+) : AuthFlow(data, parent) {
+    m_steps.append(new OfflineStep(m_data));
+}
+
+OfflineLogin::OfflineLogin(
+    AccountData *data,
+    QObject *parent
+) : AuthFlow(data, parent) {
+    m_steps.append(new OfflineStep(m_data));
+}