Packaging

[lionfish0]

Need to set up packaging properly.

Note on requirements: https://github.com/SheffieldMLtracking/pylibdmtx is needed (not the one it's forked from). It is also optional (but need code to handle this) --> as one can pass the results to the decode method.

[lionfish0]

See https://github.com/SheffieldMLtracking/retrodetect/blob/master/pyproject.toml for example.