feat: Extra duration with a min and max duration

[dukeofharen]

Feature Request

Describe the Feature Request

As can be read here, it is possible to delay the response with an x amount of milliseconds before returning it, to simulate a slow connection. It would be nice to also provide a min and a max number of milliseconds. This way, HttPlaceholder will pick a random number in between these 2 numbers. HttPlaceholder will wait this amount of milliseconds longer before returning the response.

Describe Preferred Solution

Here is an example of how this might look like:

- id: slow
  conditions:
    method: GET
    url:
      path:
        equals: /slooooow
  response:
    text: This was very slow.
    extraDuration:
      min: 20000
      max: 40000

Make sure to:

• update the OpenAPI definition of the extraDuration.
• update the stub validator so min can not be larger than / equal to max.

Describe Alternatives

Related Code

Additional Context

If the feature request is approved, would you be willing to submit a PR?
Yes / No (Help can be provided if you need assistance submitting a PR)