Adding workflow files for checking for Copyright headers.

[staylorTT]

Adding the spdx / copyright workflow changes based off the ones we have in tt-mlir. Is there a way to check if these run as expected?

[sdjordjevicTT]

It seems that the spdx check failed in this pipeline. Can you please check whether we need spdx headers in these files:
NO SPDX ./pybuda/pybuda/fx/init.py
NO SPDX ./pybuda/test/mlir/mnist/init.py
NO SPDX ./pybuda/test/fx/init.py
NO SPDX ./pybuda/test/operators/tm/fuse/init.py
NO SPDX ./pybuda/test/tvm/cnn/pytorch/videopose/model.py
NO SPDX ./third_party/fmt/fmt/args.h
NO SPDX ./third_party/fmt/fmt/ranges.h
NO SPDX ./third_party/fmt/fmt/xchar.h
NO SPDX ./third_party/fmt/fmt/os.h
NO SPDX ./third_party/fmt/fmt/color.h
NO SPDX ./third_party/fmt/fmt/core.h
NO SPDX ./third_party/fmt/fmt/format-inl.h
NO SPDX ./third_party/fmt/fmt/ostream.h
NO SPDX ./third_party/fmt/fmt/chrono.h
NO SPDX ./third_party/fmt/fmt/printf.h
NO SPDX ./third_party/fmt/fmt/locale.h
NO SPDX ./third_party/fmt/fmt/format.h
NO SPDX ./third_party/fmt/fmt/compile.h
NO SPDX ./third_party/json/json_fwd.hpp
NO SPDX ./third_party/json/json.hpp
NO SPDX ./third_party/json/pybind11_json.hpp

[staylorTT]

For Third Party files see #40

for the empty init files I have submitted a PR in the enarx/ repo: enarx/spdx#22

[staylorTT]

Empty files will now be ignored by the checker.

[staylorTT]

@nvukobratTT PTAL if you can.

[nvukobratTT]

LGTM! Thanks for pushing this further!

@vmilosevic can you confirm if config files are optimal? Are there some improvements you would suggest? If not, please approve this PR as well.

[staylorTT]

@vmilosevic Can you PTAL at this from a workflow POV to make sure it's compatible with what you had in mind.

[vmilosevic]

Looks good