Add a reason parameter in expect

[MisterLight]

Clear and concise description of the problem

Just a little message can help to document the thing under test, thats why in some testing libraries is possible to supply a custom message for a given expectation.

Coming from Jest I was capable of doing this thanks to this library:

jest-expect-message

But I think it would be great if vitest come with it natively

Suggested solution

Using the same code from the mentioned library before:

test('returns 2 when adding 1 and 1', () => {
  expect(1 + 1, 'Woah this should be 2!').toBe(3);
});

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[sheremet-va]

It already has one.