Envelope Migration: Remove `StepDefinitionRegistered` Event in favour of pre-existing envelope

[luke-hill]

🤔 What's the problem you've observed?

We need to begin removing all of the "other" events registered in cucumber-ruby in favour of envelopes.

The first step is to convert all existing events into envelope events, which are just a wrapper (basic), for envelope messages proper. Which then are treated as cucumber messages

• Events::StepDefinitionRegistered
  • "Regular" Event registered HERE
  • "Envelope" Event registered HERE
• Events::UndefinedParameterType
  • "Regular" Event registered HERE
  • "Envelope" Event NOT registered
• Events::GherkinSourceRead
  • "Regular" Event registered HERE
  • "Envelope" Event NOT registered

✨ Do you have a proposal for making it better?

Begin to identify, refactor, and delete the events - Watch what fails and begin to fix it up

📚 Any additional context?

This will need to be done several times for all the different ones

[luke-hill]

This is misunderstood. We should use MessageBuilder class to handle each of these in situ (for now), until a point we want to refactor out the events from many types to a single type and then just use verbose messages