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/statemodel.h

@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: 2022 Tobias Fella <fella@posteo.de>
+// SPDX-License-Identifier: LGPL-2.0-or-later
+
+#pragma once
+
+#include <QAbstractListModel>
+
+#include "neochatroom.h"
+
+class StateModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+    Q_PROPERTY(NeoChatRoom *room READ room WRITE setRoom NOTIFY roomChanged)
+
+public:
+    enum Roles {
+        TypeRole,
+        StateKeyRole,
+        SourceRole,
+    };
+    Q_ENUM(Roles);
+
+    StateModel(QObject *parent = nullptr);
+    QHash<int, QByteArray> roleNames() const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+    int rowCount(const QModelIndex &parent) const override;
+
+    NeoChatRoom *room() const;
+    void setRoom(NeoChatRoom *room);
+
+Q_SIGNALS:
+    void roomChanged();
+
+private:
+    NeoChatRoom *m_room = nullptr;
+};