[Enhancement] Coin flip feature for new mnemonics

[4rkad]

It would be good option to add coin flip feature to create a new mnemonic. Just 2 options to choose, heads and tails. 128 flips to 12 words mnemonic and 256 flip for 24 words mnemonic. I know tinyseed is a similar feature but can be difficult to understand for some users. And can be difficult to do in small devices like Yahboom and others.