[FR] Support Topics

[Ovler-Young]

It would be useful to have the ability to automatically create forum topic in Telegram supergroups to link chats. This would help keep conversations organized and easy to follow across multiple chats. Most of all, it can free us from creating groups and mannually link it.

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like

• EFB Telegram Master should automatically create a new forum topic when a new unlinked chat is detected.
• The topic title should contain info to identify the linked chats.
• New messages sent in the linked chats should be cross-posted to the linking topic.

Describe alternatives you've considered
#126 or by hand

Additional context

Python telegram bot, the lib ehForwarderBot is using, have the ability to create forum topic by bot.Here is the document: https://docs.python-telegram-bot.org/en/stable/telegram.bot.html#telegram.Bot.create_forum_topic

[Ovler-Young]

Use topics also helps to reduce the number of channels or supergroups we're in.
Channels and supergroups number users can be member of is up to 500; And for Premium users it is up to 1000. But that might still be not enough.
Now as a heavy user of efb, I have 223 groups with by bot. That's nearly half of the free plan.
Although we can link muiltypie chats in one group, but that will cause each time we want to chat, we'll have to select which chat to send which is very annoying. If we use topics, we can directly send to that topic.