Assisted Keys: BIP-85 Support

[Parsh]

Task Description To implement BIP-85 for assisted keys and provide the users with an option to custody their own assisted key(off Keeper).

Note: We are not maintaining backward compatibility, we'll extend support for current assisted key users as it is.

Detailed breakdown available here: https://github.com/bithyve/SigningServer/issues/68

[summikhan11]

https://xd.adobe.com/view/f1543c84-c25a-4ad6-81ca-1e0c540e956e-a407/screen/2d5702d6-0cb9-4f37-bc90-ca64ffdd5152/

[summikhan11]

@ASN-BitHyve content peding

[summikhan11]

updated based on discussion

Key settings screen: https://xd.adobe.com/view/f1543c84-c25a-4ad6-81ca-1e0c540e956e-a407/screen/755efad0-fc7f-4d54-a3d4-04d01d87b86c/specs/ @ASN-BitHyve need content here

Flow: https://xd.adobe.com/view/f1543c84-c25a-4ad6-81ca-1e0c540e956e-a407/screen/2b96db1f-a815-422f-96c0-e1fbfc9224b0/

[ASN-BitHyve]

updated based on discussion

Key settings screen: https://xd.adobe.com/view/f1543c84-c25a-4ad6-81ca-1e0c540e956e-a407/screen/755efad0-fc7f-4d54-a3d4-04d01d87b86c/specs/ @ASN-BitHyve need content here

Flow: https://xd.adobe.com/view/f1543c84-c25a-4ad6-81ca-1e0c540e956e-a407/screen/2b96db1f-a815-422f-96c0-e1fbfc9224b0/

Have put in.

[Deveshshankar]

Alreday implemented