Announcing Cherrybomb, we finally changed the name

Hi rustaceans,

After a lot of feedback from the Rust community and some other cybersecurity communities we decided to make two big changes in this version:

1. We decided to rebrand as Cherrybomb (the previous name was firecracker).
2. We decided to add another functionality to it, one with less user friction, so you won't need much to start using it - an OpenAPI specification validator.

And a few small and important ones like: adding an install script, changing the README, adding a contribution guide and so on...

We would love to hear your opinions on our new and improved repo!