Move the qt models to their own folder

Felt like the src folder was getting a bit crowded so move all the models to a folder named models.

src/models/messagefiltermodel.cpp

@@ -0,0 +1,65 @@
+// SPDX-FileCopyrightText: 2021 Nicolas Fella <nicolas.fella@gmx.de>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
+
+#include "messagefiltermodel.h"
+
+#include "messageeventmodel.h"
+#include "neochatconfig.h"
+
+using namespace Quotient;
+
+MessageFilterModel::MessageFilterModel(QObject *parent)
+    : QSortFilterProxyModel(parent)
+{
+    connect(NeoChatConfig::self(), &NeoChatConfig::ShowLeaveJoinEventChanged, this, [this] {
+        beginResetModel();
+        endResetModel();
+    });
+
+    connect(NeoChatConfig::self(), &NeoChatConfig::ShowRenameChanged, this, [this] {
+        beginResetModel();
+        endResetModel();
+    });
+
+    connect(NeoChatConfig::self(), &NeoChatConfig::ShowAvatarUpdateChanged, this, [this] {
+        beginResetModel();
+        endResetModel();
+    });
+    connect(NeoChatConfig::self(), &NeoChatConfig::ShowDeletedMessagesChanged, this, [this] {
+        beginResetModel();
+        endResetModel();
+    });
+}
+
+bool MessageFilterModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
+{
+    const QModelIndex index = sourceModel()->index(sourceRow, 0, sourceParent);
+
+    const int specialMarks = index.data(MessageEventModel::SpecialMarksRole).toInt();
+    if (index.data(MessageEventModel::IsNameChangeRole).toBool() && !NeoChatConfig::self()->showRename()) {
+        return false;
+    }
+
+    if (index.data(MessageEventModel::IsAvatarChangeRole).toBool() && !NeoChatConfig::self()->showAvatarUpdate()) {
+        return false;
+    }
+    if (index.data(MessageEventModel::IsRedactedRole).toBool() && !NeoChatConfig::self()->showDeletedMessages()) {
+        return false;
+    }
+
+    if (specialMarks == EventStatus::Hidden || specialMarks == EventStatus::Replaced) {
+        return false;
+    }
+
+    const auto eventType = index.data(MessageEventModel::EventTypeRole).toInt();
+
+    if (eventType == MessageEventModel::Other) {
+        return false;
+    }
+
+    if (!NeoChatConfig::self()->showLeaveJoinEvent() && eventType == MessageEventModel::State) {
+        return false;
+    }
+
+    return true;
+}