mindev: Add new subcommand to validate ruletype updates

[JAORMX]

Summary

mindev ruletype validate-update (or mindev ruletype vu for short)
takes two YAML files and validate if the rule type can be updated (or
not).

$ mindev ruletype validate-update -h
The 'ruletype validate-update' subcommand allows you to validate an update of a rule type
definition

Usage:
  mindev ruletype validate-update [flags]

Aliases:
  validate-update, vu

Flags:
  -a, --after string    file to read rule type definition from
  -b, --before string   file to read rule type definition from
  -h, --help            help for validate-update

If the validation succeeds, we should just get a "zero" return value.

$ mindev ruletype vu -b before.yaml -a after.yaml

If it fails, we should get the reasoning, and a non-zero return value:

$ mindev ruletype vu -b before.yaml -a after.yaml
Error: error validating param schema update: failed to validate properties: cannot remove properties from rule schema
Message: Error on execute
Details: error validating param schema update: failed to validate properties: cannot remove properties from rule schema
 [1] $

This should help us gate rule type updates in CI more easily.

Change Type

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• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

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Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.