[Feature]: Subtype `PlaywrightException` in the case of failing assertions

🚀 Feature Request

Playwright exceptions that come from Expects would be be subtyped.

public sealed class PlaywrightAssertionException : PlaywrightException
{
    public PlaywrightAssertionException()
    {
    }

    public PlaywrightAssertionException(string message) : base(message)
    {
    }

    public PlaywrightAssertionException(string message, Exception innerException) : base(message, innerException)
    {
    }

Example

No response

Motivation

I am following the guidance of `Expect'- first assertions and migrating away from NUnit assertions in the process. However, it was useful to me to know when a test failed because of an assertion exception, or when the test was was improperly crafted.

I am happy to implement this feature myself.

Begin at the .NET Expect assertion implementation, locating where assertion failures currently throw PlaywrightException, and inspect nearby tests. Use the proposed PlaywrightAssertionException constructors as the API reference. Done means failing Expect assertions expose the subtype while the existing exception behavior remains covered by tests.