Add cvat-cli for administrating computer vision annotation projects

[achimgaedke]

cvat-cli for administrating computer vision annotation projects

That's a follow up on the cvat SDK feedstock, but comes from upstream as a separate pip package...

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[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/cvat-cli/meta.yaml) and found it was in an excellent condition.

[achimgaedke]

@conda-forge/help-python, ready for review!