Summary

Let's add an analyzer (enabled by default as info) to move off from StringAssert APIs and instead use the equivalent Assert API. The main change (for the codefix) is that the first 2 parameters have been swapped, for example StringAssert.Matches([NotNull] string? value, [NotNull] Regex? pattern) now becomes Assert.Matches([NotNull] Regex? pattern, [NotNull] string? value).