[Badge Request] Telegram channel and group badges

## :clipboard: **Description**
Telegram channel and group badges.

For channel
- 

For public group
- 
- 

## :link: **Data**
You can get these data directly from the URL content.

For channel
- Format: https://t.me/[ChannelName]
- Example: https://t.me/telegram
- You can get the number of members there.

For public group
- Format: https://t.me/[GroupName]
- Example: https://t.me/durovschat
- You can get the number of members and online there.

## :microphone: **Motivation**
A channel or group can be displayed in the README with the number of members or online.

##
:heart: **Thanks for this great project!**

The issue defines Telegram channel and public-group URL formats and the member or online counts to display. Start by locating the badge entry point that handles external service URLs, then verify the channel and group examples; done means both badge variants render the requested counts from their t.me pages.

Written by the indexing model from the issue text.