`to_txt` breaks for few messages (#L98 `if-elif` loop)

[Dexter2389]

There are messages that have text_data, media and reply_to as None which causes this if-elif loop to break.

[Dexter2389]

After investigating this issue, it was found that the messages that were breaking this if-elif loop, were from message_location table and message_payment_invite table.

Since message_payment_invite is unimportant, we can skip that for now and handle it by having an else statement to handle it.

To handle message_location we build an entirely new resolver and add it as a Message class field.