Add ability to send files via io.kestra.plugin.notifications.telegram.TelegramSend

### Feature description

It would be nice to be able to send files, not just text via io.kestra.plugin.notifications.telegram.TelegramSend
Especially, if "from" syntax will be supported to seamlessly send content of the other task's output as a file

Start at io.kestra.plugin.notifications.telegram.TelegramSend, the entry point named in the issue, and inspect how it currently sends text. Determine the existing task-output syntax and the Telegram API path used for messages. Done means the task can send files as well as text, with the requested from syntax supported if feasible and covered by the project's tests.

Written by the indexing model from the issue text.