Add serialiseToBech32CIP129

[smelc]

Warning

We're trying things out at the moment. PR opened only for sharing what we're doing between @CarlosLopezDeLara and I

Changelog

- description: |
    Add serialiseToBech32CIP129
# 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...

Context

• Trial to implement [FEATURE] - extend drep id cmd so that it returns id in hex and bech32 for script based dreps. Use CIP129 cardano-cli#883
• Corresponding CLI PR: drep id: change output to honor CIP129 cardano-cli#1059

How to trust this PR

TBD

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

[smelc]

Closing, as it is replaced by #778