Add generic cri implementation

[fristonio]

Currently the only container runtime available for use is docker, while it is great it adds a lot of extra overhead. We can use more stripped down version of container runtimes(like containerd) using a generic container runtime interface similar to what kubernetes have, this way we can implement any cr that kubernetes support with beast.

For the purpose of building images in the above case we can leverage dockers buildkit project which has a lot of cool features we can use. This will improve modularity and flexibility in the project.