BIP85 support

[kirillkovalenko]

Please add BIP85 support

[aido]

Great idea.

Would like to use seedtool-cli with BIP85 to create something like this:

---
title: One Seed to rule them all - Multi wallet
---
flowchart TB
    1.1 --> |Backup| 1.2
    1 --> |BIP85 Child 0| 2.1.1
    1 --> |BIP85 Child 1| 2.1.2
    1 --> |BIP85 Child 2| 2.2.1
    1 --> |BIP85 Child 3| 2.2.2
    1 --> |BIP85 Child 4| 2.3.1
    1 --> |BIP85 Child 5| 2.3.2
    1 --> |BIP85 Child 6| 2.4.1
    1 --> |BIP85 Child 7| 2.4.2
    subgraph 1[Parent]
        direction TB
        1.1[Root Seed]
        subgraph 1.2[2-of-3 Shamir's Secret Shares]
            direction BT
            1.2.1[Share 1]
            1.2.2[Share 2]
            1.2.3[Share 3]
        end
    end
    subgraph 2[Children]
        direction TB
        subgraph 2.1[Cold Wallet]
            direction LR
            2.1.1[BIP39 #1]
            2.1.2[Password #1]
            end
            subgraph 2.2[Hardware Wallet]
            direction LR
            2.2.1[BIP39 #2]
            2.2.2[Password #2]
            end
            subgraph 2.3[Lightning Wallet]
            direction LR
            2.3.1[BIP39 #3]
            2.3.2[Password #3]
            end
            subgraph 2.4[Phone Wallet]
            direction LR
            2.4.1[BIP39 #4]
            2.4.2[Password #4]
            end
    end