Remove any dependencies on App from the spaces module.

Remove any dependencies on App from the spaces module. This requires moving some dialogs either to spaces, or libneochat if they're used more generically.

src/spaces/RemoveChildDialog.qml

@@ -0,0 +1,49 @@
+// SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+import QtQuick
+import QtQuick.Layouts
+
+import org.kde.kirigami as Kirigami
+import org.kde.kirigamiaddons.formcard as FormCard
+
+import org.kde.neochat.libneochat
+
+Kirigami.Dialog {
+    id: root
+
+    required property NeoChatRoom parentRoom
+
+    required property string roomId
+
+    required property string displayName
+
+    required property string parentDisplayName
+
+    required property bool canSetParent
+
+    required property bool isDeclaredParent
+
+    title: i18nc("@title", "Remove Child")
+
+    width: Math.min(applicationWindow().width, Kirigami.Units.gridUnit * 24)
+
+    standardButtons: Kirigami.Dialog.Ok | Kirigami.Dialog.Cancel
+
+    onAccepted: parentRoom.removeChild(root.roomId, removeOfficalCheck.checked)
+
+    contentItem: ColumnLayout {
+        spacing: 0
+        FormCard.FormTextDelegate {
+            text: i18n("The child %1 will be removed from the space %2", root.displayName, root.parentDisplayName)
+            textItem.wrapMode: Text.Wrap
+        }
+        FormCard.FormCheckDelegate {
+            id: removeOfficalCheck
+            visible: root.isDeclaredParent
+            enabled: root.canSetParent
+            text: i18n("The current space is the official parent of this room, should this be cleared?")
+            checked: root.canSetParent
+        }
+    }
+}