Generates a basic architecture test file with a cycle-freedom check.
mix arch_test.install
Creates test/<app>_arch_test.exs with use ArchTest, app: :<app> and a single should_be_free_of_cycles/1 test as a starting point.
test/<app>_arch_test.exs
use ArchTest, app: :<app>
should_be_free_of_cycles/1