feat: utxo locking

[mkazlauskas]

Context

Need to provide functionality that wallets need to prevent double-spend attempts.

Proposed Solution

• add availableUtxos field to UtxoRepository and implement it for InMemoryUtxoRepository
• implement InMemoryTransactionTracker

Important Changes Introduced

• Add flushPromises utility function to util-dev package, cslToOgmios.txIn to core package
• Add a dependency to emittery and delay
• Add transactionUntracked event to InMemoryUtxoRepository. To recover user should attempt to call TransactionTracker.trackTransaction manually.
• Update MockProvider to use jest.fn for utxoDelegationAndRewards and a few other provider functions.
• Create a ProviderError and implement the conversion for blockfrostProvider.
• Enable eslint @typescript-eslint/no-floating-promises and disable @typescript-eslint/no-var-requires (covered by unicorn/prefer-module)

[rhyslbw]

This was drafted in the previous review, but it must have been deleted when I thought I was de-duping responses.

[rhyslbw]

Great work here @mkazlauskas . My review is still in progress, but submitting early for advanced notice. What does the withdrawal example look like positioned as an integration test? The need for an example is really just pointing out a gap in our tests, which gains us the assurance we cannot otherwise have with pure examples.

[rhyslbw]

Looks good! Please squash into minimal commits, then we're ready to merge.