The pretty formatter does not report rules

From a Slack conversation here: https://cucumberbdd.slack.com/archives/C7676D8GN/p1622078810002700

When running `$ cucumber --format pretty` on a file that uses the “Rule” keyword, with Cucumber 6, should I be seeing the Rules print out to the console along with the Features and Scenarios? I have my file formatted like this:
```gherkin
Feature: ...
Rule: ...
Scenario: ...
Given
When
Then
```

But I am not seeing the Rules print out to the console.

Note: the pretty formatter is hard to maintain

Suggestion: having the pretty formatter rewritten into the monorepo to use shared testdata and have a consistent behavior in different languages.

Start by reproducing `cucumber --format pretty` with the Gherkin example containing a Rule, then trace the pretty formatter's output path. Done means the Rule is printed alongside the Feature and Scenario; the broader rewrite suggestion would also require shared test data and consistent behavior across languages.

Written by the indexing model from the issue text.