Add support for Telegram topics

[achlyss-8]

💡 The Idea

Topics are new in telegram, and allow like discord to create several channels/topics to organize notifications. Currently it's not possible to use them and all notifications arrive in one and the same chat.
Since version 6.4 of Telegram Bot API, they added the message_thread_id to choose the topic in which to send the message: https://core.telegram.org/bots/api#december-30-2022
You have to make this field optional, because you can use a group without the topics.

Additional Context

Tautulli has just implemented it in the latest version following this issue: Tautulli/Tautulli#1980
How to get the message_thread_id https://stackoverflow.com/questions/74773675/how-to-get-topic-id-for-telegram-group-chat

[caronc]

This has now been merged; closing issue