Feature_Request

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

• Since the script has the ability to maintain where it left off, why not incorporate a "gentle shutdown" feature to allow the script to gently exit and record the last post id scraped, instead of pressing Ctrl-C and immediately forcing the script to come to a full stop?

**Describe the solution you'd like

Show in message logs events like "new pinned message", "new user added", etc.

Handle these events here:

app.event_polling(update)

P.S.
A base implementation for these events were done on "show recent history" but not finished:

app.on_selected_chatroom(event, entity):
https://github.com/Hackermen/termgram/blob/master/termgram/app.py#L195

Notification messages must appear in his