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/EmojiItem.qml

@@ -0,0 +1,33 @@
+// 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
+
+    property alias emoji: emojiLabel.text
+    property alias description: descriptionLabel.text
+
+    QQC2.Label {
+        id: emojiLabel
+        Layout.fillWidth: true
+        Layout.preferredWidth: Kirigami.Units.iconSizes.huge
+        Layout.preferredHeight: Kirigami.Units.iconSizes.huge
+        verticalAlignment: Text.AlignVCenter
+        horizontalAlignment: Text.AlignHCenter
+        font.family: "emoji"
+        font.pointSize: Kirigami.Theme.defaultFont.pointSize * 4
+    }
+    QQC2.Label {
+        id: descriptionLabel
+        Layout.fillWidth: true
+        verticalAlignment: Text.AlignVCenter
+        horizontalAlignment: Text.AlignHCenter
+    }
+}