Add `mktar_from_directory` util

## Long story short

I have used aiodocker in a couple of projects, the one thing i find myself implementing is a `mktar_from_directory` function (or similar) to enable building an image with artefacts

my implementaion/s are very similar to the existing `mktar_from_directory`, im wondering if it would be helpful to PR this addition

## How to reproduce

try to build an image that has artefacts