Move remaining code to app module

There's still some stuff that could potentially go elsewhere but I think it's enough for now.

src/app/qml/VerificationMessage.qml

@@ -0,0 +1,38 @@
+// SPDX-FileCopyrightText: 2022 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import QtQuick
+import QtQuick.Controls as QQC2
+import QtQuick.Layouts
+
+import org.kde.kirigami as Kirigami
+import org.kde.neochat
+
+ColumnLayout {
+    id: root
+
+    required property string icon
+    required property string text
+
+    anchors.fill: parent
+
+    Item {
+        Layout.fillHeight: true
+    }
+    Kirigami.Icon {
+        Layout.fillWidth: true
+        Layout.preferredWidth: Kirigami.Units.iconSizes.enormous
+        Layout.preferredHeight: Kirigami.Units.iconSizes.enormous
+        source: root.icon
+    }
+    QQC2.Label {
+        Layout.fillWidth: true
+        text: root.text
+        textFormat: Text.MarkdownText
+        horizontalAlignment: Text.AlignHCenter
+        wrapMode: Text.Wrap
+    }
+    Item {
+        Layout.fillHeight: true
+    }
+}