Add BitcoinSV Support

[afomi]

Story

As a Developer,
I want to interact with the BitcoinSV blockchain.

Acceptance Criteria

When Developer specifies bitcoin-sv in settings
And the Developer specifies a test net or prod
Developer can perform all Tx and Block transactions successfully.

(list each method. ensure tests)

[krtschmr]

can be closed. nobody wants to support that shit :-)