Add visualisation of the account's third party IDs in the account editor.

A category won't be shown if there are no relevant IDs (will add the ability to add new ones later).

Part of network/neochat#565

![image](/uploads/7da00b0b4acf90d145c09969ac2a91e1/image.png)

src/settings/ThreePIdCard.qml

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: 2024 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import QtQuick
+import QtQuick.Layouts
+
+import org.kde.kirigami as Kirigami
+import org.kde.kirigamiaddons.formcard as FormCard
+import org.kde.kitemmodels
+
+import org.kde.neochat
+
+ColumnLayout {
+    id: root
+
+    required property NeoChatConnection connection
+
+    required property string title
+    required property string medium
+
+    visible: deviceRepeater.count > 0
+
+    FormCard.FormHeader {
+        title: root.title
+    }
+    FormCard.FormCard {
+        id: devicesCard
+
+        Repeater {
+            id: deviceRepeater
+            model: KSortFilterProxyModel {
+                sourceModel: root.connection.threePIdModel
+                filterRoleName: "medium"
+                filterString: root.medium
+            }
+
+            delegate: FormCard.FormTextDelegate {
+                required property string address
+                text: address
+            }
+        }
+    }
+}