ENH: Transition project configuration to pyproject.toml

[jhlegarreta]

Transition project configuration to pyproject.toml.

Used the setup-py-to-pyproject-toml.py script in the ITKModuleTemplate repository:
https://github.com/InsightSoftwareConsortium/ITKModuleTemplate

as a starting base, then made manual changes as necessary.

[dzenanz]

#!/bin/bash -eo pipefail
ctest -j 2 -VV -S dashboard.cmake

* Extra verbosity turned on
Reading Script: /ITKNeuralNetworks-build/dashboard.cmake
CMake Error at /ITKNeuralNetworks-build/itk_common.cmake:96 (cmake_minimum_required):
  CMake 3.16.3 or higher is required.  You are running version 3.11.1
Call Stack (most recent call first):
  /ITKNeuralNetworks-build/dashboard.cmake:14 (include)

Exited with code exit status 255

CircleCI received exit code 255

[dzenanz]

Perhaps we should archive this repository, instead of trying to maintain it?

[jhlegarreta]

As you deem it wise @dzenanz; unfortunately, I do not have the bandwidth now to have a look and fix the previously existing issues, required changes to keep them up-to-date with newer ITK versions, or infrastructure (CMake, GitHub actions, etc.) on the 60 remotes; I just committed to the transition to pyproject.toml using the wonderful script Matt had developed. Apologies for that.

[dzenanz]

@hjmjohnson @thewtex what do you think?

[blowekamp]

Perhaps we should archive this repository, instead of trying to maintain it?

I don't believe there is any modern utility to using the module any longer.

[thewtex]

+1 for archiving. @hjmjohnson has removed it completely for ITK 6. I will go ahead and mark it as such.