Cover all Tx submission errors in monads for greater DX

[uhbif19]

Now bunch of Cardano errors are returned in raw form, which is hard to comprehend for user. We need to cover all such errors, preferably by static check of constraints DSL.

All stuff covered by static checks was separated to #81

TODO:

• Parse submitting errors to structured datatype (same across backends)
• Handle TxInOutdated and WrongSlot events
• Graceful errors on coin selection fail

[github-actions]

Status: Blocked ❌

Issues blocking this PR:

• Implement basic static DSL for constraints #24 ❌

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