feat: Support for Telegram topics

[scottjbarr]

Is your feature request related to a problem? Please describe.

Many Telegram channels are spilt into topics. Argus currently doesn't support specifying topic ID's.

Describe the solution you'd like

I would like to be able to specify a topic ID for the Telegram notifications so messages can be sent to specific topics.

Describe alternatives you've considered

I looked at modifying the source, but I thought I'd put it out there to see if there was any support for this feature before going ahead with this.

[JosephKav]

Hi
This'd be a feature wanted in https://github.com/nicholas-fedor/shoutrrr as that's what we use for notifications