feat: Add http wait strategy

[sumihiran]

Adds external http wait strategy as an extension of IWaitForContainerOS. In doing so, http wait strategy can be chained with OS specific ones. I am opening this PR for feedback.

Todo

• [X] Wait for status code
• [ ] TLS
• [ ] Request headers
• [ ] Basic authentication
• [ ] Response predicate

Example

var waitRequestBuilder = HttpWaitRequest
    .ForPort(8024)
    .ForPath("/actuator/health")
    .ForStatusCode(200)
    .WithReadTimeout(TimeSpan.FromSeconds(5));

Wait.ForUnixContainer()
  .UntilPortIsAvailable(8024)
  .UntilHttpRequestIsCompleted(waitRequestBuilder.build())