[Feature]: Add ToMatchSelectorAsync to LocatorAssertion

[Totati]

🚀 Feature Request

Add a LocatorAssertion, so the element can be checked against matching a css selector. This would allow more robust assertions.
HTMLElement implements a matches method, this allows checking attributes, classes with one call. Same would be nice in Playwright as well.

Example

<div class='selected row' id='component'></div>

var locator = Page.Locator("#component");
await Expect(locator).ToMatchSelectorAsync('.selected');

Motivation

Using Regex and ToHaveClassAsync and checking attributes one by one with ToHaveAttributeAsync feels inefficient.

[yury-s]

Is there another example apart from matching multiple classes on the same element where it would be useful?