[Feature] Add custom description to assertThat and/or Locator naming

With assertJ, we can add a custom name for given asserted object, for example:

Assertions.assertThat(mansion.guests()).as("Living Guests").isEqualTo(7);

Will result in:

[Living Guests] expected:<[7]> but was<[6]>

Selenide comes with element-aliasing as well as the .because() call (that does the similar thing, but not on asserted element, but the assertion itself):

$("div >> span").as("Living Guests").shouldHaveSize(7).because("The guest count should be valid")

The playwright-java assertions would be more readable if we'd be able to do similar thing with PlaywrightAssertions.assertThat or even the Locator/Page/ApiResponse itself, e.g.:

// on assertion:
PlaywrightAssertions.assertThat(questCount).hasText("7").because("The guest count should be valid");
// on asserted object:
PlaywrightAssertions.assertThat(questCount).as("Living Guests").hasText("7");
// on Locator
Locator guestCount = page.locator("div >> span").as("Living Guests");

Commencez par lire l’API PlaywrightAssertions ainsi que les types Locator, Page et ApiResponse référencés dans l’issue. Comparez les exemples de nommage demandés au niveau de l’assertion et au niveau de l’objet, puis définissez une approche prise en charge et cohérente dont les messages d’échec incluent la description ou le nom personnalisé.