[feature] shell completion #96
Description
Such as https://docs.iterative.ai/shtab/use/?
- https://github.com/google/vimdoc/blob/823e3bbc1944d0377408b602ec10ba0c39a8bf8e/setup.py#L36
- https://github.com/andreafrancia/trash-cli/blob/b913bf30b277cecc04f27858d275802684ecac13/setup.cfg#L31-L33
- https://github.com/inducer/pudb/blob/1dea19a3a14ba2398e5b7909eb86cad0c0152b3d/setup.py#L24
- https://github.com/piccolomo/plotext/blob/f760510cc6957de82c57502c07e4d0c0e4762302/setup.py#L25
- https://github.com/wookayin/gpustat/blob/56a9dcf3c99f29065f1215afcff372d01da9f256/setup.py#L116