Allow filtering by address state when fetching all addresses

[KtorZ]

Context

In order to test transaction creation and submission, earlier on we had to implement the ability to list known addresses from the API. However, according to the specification, we should be able to filter known addresses by state (used vs unused).

See: Api Doc - listAddresses

Decision

• Allow filtering by address state when fetching all addresses

Acceptance Criteria

1. Query parameter state must be supported by the API layer
2. The Command line interface must have new option flags --only-used and --only-unused or an option --state=used|unused to filter accordingly.

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Development Plan

PR

Number	Base
#372	master
#395	master

QA

#395 introduces integration tests against CLI and API for listing addresses with filters (tagged ADDRESS_LIST_02):
CLI: https://github.com/input-output-hk/cardano-wallet/blob/master/lib/core/test/integration/Test/Integration/Scenario/CLI/Addresses.hs#L77-L134
API: https://github.com/input-output-hk/cardano-wallet/blob/master/lib/core/test/integration/Test/Integration/Scenario/API/Addresses.hs#L86-L132

[jonathanknowles]

@KtorZ Can we rename this task to something like:

"Allow filtering by address state when fetching all addresses"

(It seems clearer than the current title, which appears to describe a side effect of completing this task.)

[jonathanknowles]

Fix available: #372

[piotr-iohk]

@jonathanknowles it seems to be ready to move to QA? (related integration tests added in #395)

[jonathanknowles]

@jonathanknowles it seems to be ready to move to QA? (related integration tests added in #395)

Yes, I believe this one is finished.

[KtorZ]

Then let's fill in the QA section properly and move it to the appropriate section 🙏

[piotr-iohk]

Done. Implemented & tested. 👍