Issue / Clear Fake Settings

[dncsvr]

Add a tear down to clear FakeSettings.

Tasks

• Add teardown configuration for clearing FakeSettings
• Add clearInvocations parameter to TheClient helper
• Add pathContains parameter to VerifySent

Additional Tasks

• Add this helper to Spec to use it from ValueSource

  public class Enum<T> where T : notnull
  {
      public static IEnumerable<T> Values() =>
          Enum.GetValues(typeof(T)).Cast<int>().Where(it => it > 0).Cast<T>();
  }

• Add override action and configure action helpers to the rest api layer
  extensions
• Add AClientException to baked
  • Scan for other potentially reusable test extensions
• layer.md has a old style warning box
• migrate from cross-var to cross-env in docs
  • see: Issue / Nuxt as SPA learn-nuxt#58