`TranslatableComponent#visitors` is misnamed

[Antikyth]

This is not a list of visitors, but rather a List<StringVisitable> representing the different "parts" of the text component.

Say the component's text after translation is Hello, %s! and it is given an argument world with which to format. This "visitors" list would be:

• Hello,
• world`
• !

Visitable != visitor.