Move NeoChatConnection and NeoChatRoom to LibNeoChat

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

src/libneochat/messagecomponent.h

@@ -0,0 +1,22 @@
+// SPDX-FileCopyrightText: 2024 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#pragma once
+
+#include "enums/messagecomponenttype.h"
+
+struct MessageComponent {
+    MessageComponentType::Type type = MessageComponentType::Other;
+    QString content;
+    QVariantMap attributes;
+
+    int operator==(const MessageComponent &right) const
+    {
+        return type == right.type && content == right.content && attributes == right.attributes;
+    }
+
+    bool isEmpty() const
+    {
+        return type == MessageComponentType::Other;
+    }
+};