SLIP39 support for seedrecover.py

[ghost]

Since Trezor decided to introduce SLIP39 as a default backup type for the new devices, the option to recover missing words or scrambled words with this tool would be extremely helpful.

Unfortunately, my programming skills are not at the level to add the integration. :(

[3rdIteration]

Yea it will certainly be more relevant now, so it's only a matter of time before I add it.

So do you have a specific recovery that you are trying to do?

[ghost]

My friend was missing one word from the seed(20 word), so fortunately, it was easy to be done manually or with some simplified Python script. However, if more words had been missing, this tool would have come in handy.