[FR] - Expose key reading functions, which work not only on files

[carbolymer]

Internal/External
Internal

Area
Other Any other topic (Delegation, Ranking, ...).

Describe the feature you'd like
Right now cardano-api provides function for working with key files. We should provide API for reading key files from an arbitrary source (e.g. ByteString).

Describe alternatives you've considered
n/a

Additional context / screenshots
This came up as a outcome when working on https://github.com/input-output-hk/adawallet/pull/10/files

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This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 120 days.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 120 days.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 120 days.