Add cairo-test plugin to Scarb.toml manifest on new

[maciektr]

No description provided.

[THenry14]

What is the scenario when this dep is added? Does that mean that cairo-test stays as the default test plugin in scarb? Sorry for potentially dumb questions, jsut trying to understand the impact :)

[maciektr]

@THenry14
If you create a new package and run scarb test inside, it will try to run tests with cairo-test. As of now it will also fail to do so, as there is no cairo_test dependency in a newly created package.
You can create a package configured for snforge by using scarb init --snforge flag.