Add output options flags to calculate-min-fee

[smelc]

Changelog

- description: |
    Add output options flags to calculate-min-fee
# 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

• Fixes [FR] - add json option and or out-file option to calculate-min-fee #802
• Doesn't change the existing behavior: when no output flag is passed, text is written on stdout

How to trust this PR

Look at the added tests. Check they implement the expected behavior.

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]

calculate-min-fee appears here, because the code for this flag is shared with queries.

If we want to remove the terms calculate-min-fee query here, we need to generalize said parsers a bit.

[carbolymer]

You mean query right?

[smelc]

@carbolymer> No I meant calculate-min-fee query (Format output to JSON would still be a fine message)