Add toLedgerValidityInterval and fromLedgerValidityInterval

[locallycompact]

Changelog

- description: |
    Add `toLedgerValidityInterval` and `fromLedgerValidityInterval`.
# uncomment types applicable to the change:
  type:
   - feature        # introduces a new feature
  # - breaking       # the API has changed in a breaking way
   - compatible     # the API has changed but is non-breaking
  # - optimisation   # measurable performance improvements
  # - refactoring    # QoL changes
  # - bugfix         # fixes a defect
  # - test           # fixes/modifies tests
  # - maintenance    # not directly related to the code
  # - release        # related to a new release preparation
  # - documentation  # change in code docs, haddocks...
# uncomment at least one main project this PR is associated with
  projects:
  # - cardano-api
  # - cardano-api-gen
  # - cardano-rpc
  # - cardano-wasm

Context

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Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. See Running tests for more details
• Self-reviewed the diff

[github-actions]

This PR is stale because it has been open 45 days with no activity.

[github-actions]

This PR is stale because it has been open 45 days with no activity.

[carbolymer]

We have those two functions here already: https://github.com/IntersectMBO/cardano-api/blob/master/cardano-api/src/Cardano/Api/Tx/Internal/Body.hs#L1667-L1667
Would it work for you to just export them instead?

[locallycompact]

Ah ha. Yes it would.

[github-actions]

This PR is stale because it has been open 45 days with no activity.