Register stake address and stake pool

[zmrocze]

Provide script for creating the spo registering transactions and stake address registering transactions (2 things).

Lets figure out any reasonable way of doing so.
Either:

• dont do anything. user uses cardano-cli directly
• one-stop wrapper around cardano-cli
• because registering tx depends on topology, maybe in form of nix helper function of type AttrSet -> Derivation where derivation builds tx or a script building tx
• on startup service submits the transaction itself

[nrutledge]

This would now mainly consist of transferring over work that Karol did on Apex Fusion. But this is not something we have explicitly committed to in the Catalyst proposal so I am leaving out of scope for now.