Add ::getTree() and ::getInputs() helpers to ComponentTreeItem

OR leverage PHPStan infrastructure: https://phpstan.org/developing-extensions/dynamic-return-type-extensions

This seemed overkill, but the top of that page links to https://phpstan.org/developing-extensions/dynamic-return-type-extensions, which seems very doable. Just gave that a try in the MR I opened 🤞

That worked!

Let's see how much clean-up this enables… 🤓

wim leers → credited larowlan → .

Finishing this up, given @larowlan's MR approval.

Bizarre e2e test failures, with completely white screenshots of failures 🤪 Seems like a very deep Cypress or Chrome fail … Re-running.

This then also conflicted with 📌 Remove ComponentTreeMeetsRequirementsConstraint::$nested Active , which just landed, but it also allowed even more clean-up.

Final tally: 12 files, +26, −59 😊 Not a great deal, but I know several people working on XB got turned around over these — so it's nice to get that out of the way.

Automatically closed - issue fixed for 2 weeks with no activity.