Implement opening of t.me/bot/app-s.

Telegram/SourceFiles/data/data_bot_app.cpp

@@ -0,0 +1,13 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "data/data_bot_app.h"
+
+BotAppData::BotAppData(not_null<Data::Session*> owner, const BotAppId &id)
+: owner(owner)
+, id(id) {
+}