This moves resolving of the config from the pattern constructor to the
init() method. The idea is that adding a part to a pattern is exactly
the same as adding a part to a design. In other words, late-stage adding
of parts would be no different as the config gets resolved after that.
This is currently broken in many different ways, but the unit tests
particular to this new way of resolving the config do pass.
This adds new top-level part config settings:
- hide: hides this part and only this part (not new)
- hideDependencies: Do not hide this part, but hide its dependencies
- hideAll: Hide both this part and its dependencies
