[Feature]: Add a locator builder method withTextEquals()

[mirao]

What are you trying to achieve?

In DOM sometimes we have multiple elements ".item" with a text containing "Add", e.g. "Add", "Add problem" or just a text "Addison Ryan" (a user full name).

When a test clicks on a link (".item") with the text "Add", it can't use locate(".item").withText("Add") because all "Add*" elements match (and thus any of them can be "randomly" selected).

It would be handy to have a method withTextEquals() (an analogy to the Playwright helper's method seeTextEquals()) that selects a locator which's text equals to passed argument.

XPath allows .= and text()=, see https://stackoverflow.com/a/34595441/10172701
IMHO .= is better for our case as it computes string as a concatenation of all strings inside element, so it behaves similar as contains(., ${text}) (used by withText())