Support ::part selector (#37307)

This is pretty much just wiring up the necessary stylo methods. Note
that the `exportparts` attribute is not yet supported, I'll do that in a
followup change

Testing: Covered by existing web platform tests.
This is the first half of https://github.com/servo/servo/issues/35349

Fixes https://github.com/servo/servo/issues/37325

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
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Simon Wülker 2025-06-09 12:17:28 +02:00 committed by GitHub
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36 changed files with 119 additions and 348 deletions

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@ -144,3 +144,8 @@ Element includes NonDocumentTypeChildNode;
Element includes ParentNode;
Element includes ActivatableElement;
Element includes ARIAMixin;
// https://drafts.csswg.org/css-shadow-parts/#idl
partial interface Element {
[SameObject, PutForwards=value] readonly attribute DOMTokenList part;
};