Support adding 3 PIDs

Implements part of network/neochat#565

Note the phone number stuff is untested as neither kde.org or matrix.org have them switched on.

src/jobs/neochatadd3pidjob.cpp

@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: 2024 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#include "neochatadd3pidjob.h"
+
+using namespace Quotient;
+
+NeochatAdd3PIdJob::NeochatAdd3PIdJob(const QString &clientSecret, const QString &sid, const Omittable<QJsonObject> &auth)
+    : BaseJob(HttpVerb::Post, QStringLiteral("Add3PIDJob"), makePath("/_matrix/client/v3", "/account/3pid/add"))
+{
+    QJsonObject _dataJson;
+    addParam<IfNotEmpty>(_dataJson, QStringLiteral("auth"), auth);
+    addParam<>(_dataJson, QStringLiteral("client_secret"), clientSecret);
+    addParam<>(_dataJson, QStringLiteral("sid"), sid);
+    setRequestData({_dataJson});
+}