Add VCR support for testing Web Requests handling

[malparty]

Why

In order to enable testing the handling of web requests made by our Gin application in a near-real situation — without impacting the speed of test executions.

How?

• Research about the go-VCR package
• expose pros/cons and submit a poll to decide if we should support it in our Gin-Template
• if yes is voted:
  • implement go-VCR in our gin-template to provide a VCR solution working out of the box
  • document the usage in the generated project README.md file

Who Benefits?

Developers and their projects with an additional tool to support testing.

[junan]

@malparty This issue looks good to me. Do you want to work(research => poll based on research => ...)on it? If yes I can assign it to you.