feat: Add option to log the response that has been given for a specific request

[dukeofharen]

Feature Request

Describe the Feature Request

It would be a nice feature to also log the response that has been given for a specific request to HttPlaceholder. This is especially handy if the associated stub has been removed or updated or if the response contains variables.

Describe Preferred Solution

• The option to log responses should be disabled by default, because logging the responses might increase the data store drastically.
• The UI should be updated to show, per request, if a response is available and the option to view the response.
• A response consists of response body, status code and headers.
• The response needs to be deleted together with the associated request.

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)

[dukeofharen]

Done (see PR #230)