feat: send sent messages to the room as well

[jficz]

Currently only received messages get pushed to the matrix room.

Having sent messages there as well would make the conversation view in the room more complete.

[MangoCubes]

Do you mean the conversations that happened prior to creating the room?

[jficz]

not necessarily a backfill (though that would be nice) but if I send an SMS from the phone, it's not forwarded to the room, only received messages are