Add mnemonic phrase support (to ethers-cli)

[dlasher]

Poking around, if it's an option, I can't find it.. how do you import an existing mnemonic wallet?

[ricmoo]

There is not currently that functionality.

The problem is mnemonics are generally not encrypted (and encrypted mnemonics have their own family of problems).

I recommend in general using an encrypted wallet. However, since a lot of people using this tool likely come from Metamask, I should probably add that feature. I will put it on my short list. The breeding methods are almost done, so I will get to this after those.