Migrate xUnit assertions to TUnit

Proprietary

Replace xUnit Assert.* calls with TUnit's fluent await Assert.That(...).Is*() assertions. Note: test methods may need to be changed to async Task separately.

OpenRewrite.Recipes.CSharp.Migration.TUnit.FromXUnit.MigrateXUnitAssertions

mod run . --recipe=OpenRewrite.Recipes.CSharp.Migration.TUnit.FromXUnit.MigrateXUnitAssertions

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.