@std/expect: provide message to expect

[dandv]

Is your feature request related to a problem? Please describe.

expect failure messages like "error: AssertionError: Expected 0 to be greater than 0" could be more informative. The ability to add a failure message to the expect would be very useful, and many testing libraries allow supplying a custom message for a given expectation.

Demand for this feature can be seen at
https://stackoverflow.com/questions/45348083/how-to-add-custom-message-to-jest-expect.

Describe the solution you'd like

From the jest-expect-message library:

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

Describe alternatives you've considered

@std/assert doesn't mention any message capabilities either.