Move NeoChatConnection and NeoChatRoom to LibNeoChat

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

src/libneochat/emojitones.cpp

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: None
+// SPDX-License-Identifier: LGPL-2.0-or-later
+
+#include "emojitones.h"
+#include "models/emojimodel.h"
+
+using namespace Qt::StringLiterals;
+
+QMultiHash<QString, QVariant> EmojiTones::_tones = {
+#include "emojitones_data.h"
+};