Enhancement: make a bip85 app for deterministic entropy

[stepansnigirev]

We have apps structure now, so we could develop an "app" that implements deterministic entropy derivation according to BIP-85. App has access to the keystore, so it could derive new seeds or WIFs or whatever from the root key of the keystore and show it on the screen. Completely stateless, no data storage, no communication with the host - only a GUI menu.

[xavierfiechter]

https://github.com/ethankosakovsky/bip85 requires "mnemonic", "pycoin", "base58", "monero" and "pycryptodome".

Could these libs be added to the framework or what is the best way to use the dependencies?

[stepansnigirev]

Added implementation to embit, except RSA. Gonna implement in DIY soon-ish: https://github.com/diybitcoinhardware/embit/pull/35

[jdlcdl]

I've left a comment at the following url. https://github.com/diybitcoinhardware/embit/commit/41f0a38f83f9df77bee7e0ddece4b32e3d935879

[stepansnigirev]

implemented in #265