[NayNay] Exposing substrate

[rh0delta]

Related Issue(s)

• Resolves Expose substrate as part of the Entropy Class rather than the Entropy Instance #427

Proposed Changes

• added new utility method to create substrate api instance, without needing to create an entropy instance

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed

Screenshots (if applicable)

Additional Context

Checklist

• I have performed a self-review of my code.
• I have commented my code.
• I have updated documentation, where necessary.

[frankiebee]

I'd like a little more documentation for this pointing at the polkadot docs to communicate that we don't maintain the underlying api for substrate and a warning that this might change in the future

[frankiebee]

I'd like a little more documentation for this pointing at the polkadot docs to communicate that we don't maintain the underlying api for substrate and a warning that this might change in the future

will handle with this issu: #436

[frankiebee]

sweeet