Command to create dtp secrets

## Is your feature request related to a problem? Please describe.
Create a command that wrap this dtp method as a command to generate babyjug public and private keys: 
```public async babyjubAccount(mnemonic: string): Promise<Account> ```

## Describe the solution you'd like
`ncli dtp ...`

## Additional context
Add any other context or screenshots about the feature request here.
