Move NeoChatConnection and NeoChatRoom to LibNeoChat

Move `NeoChatConnection` and `NeoChatRoom` to `LibNeoChat` along with any required dependencies.

src/libneochat/urlhelper.h

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2022 Nicolas Fella <nicolas.fella@gmx.de>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <QObject>
+#include <QQmlEngine>
+#include <QUrl>
+
+/**
+ * @class UrlHelper
+ *
+ * A class to help manage URLs.
+ */
+class UrlHelper : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+    QML_SINGLETON
+
+public:
+    /**
+     * @brief Open the given URL in an appropriate app.
+     */
+    Q_INVOKABLE void openUrl(const QUrl &url);
+
+    /**
+     * @brief Copy the given URL to the given location.
+     */
+    Q_INVOKABLE void copyTo(const QUrl &origin, const QUrl &destination);
+};