deprecate cornichon-scalatest

[agourlay]

Integrating with Scalatest helped a lot at the beginning to bootstrap the library.

Currently the better way to use cornichon is through cornichon-test-framework.

It is more lightweight and offers more controls on the implementation side.

However it currently lacks a couple of features to be a complete replacement for cornichon-scalatest.

The missing pieces:

• [x] a main runner to be able to run without SBT (useful when tests are packaged and run separately)
• [ ] generate HTML reports
• [ ] run tests from IDEA - requires the creation of plugin I guess
• [x] integration with other build tools

[agourlay]

main runner tackled here https://github.com/agourlay/cornichon/pull/290

[agourlay]

Closing due to inactivity.

No work is planned in the foreseeable future to support this feature.