Create cryptography abstractions

[faustbrian]

We use a lot of third-party dependencies for each coin to ensure that we use their latest crypto and are compatible at all times. This works fine but long-term we should implement our own cryptography abstractions that are generic enough to quickly implement other coins too avoid a lot of mixed dependencies and especially ones that are slow.

The last point, being slow, is an issue with some coins because they use JavaScript packages for things that are available natively which results in a massive performance hit and for some even in odd dependency installation issues because they are outdated which forces you to apply workarounds to get packages installed.

[faustbrian]

Moved to internal task manager.