Add project.urls section in file pyproject.toml

For instance:

[project.urls]
homepage = 'https://gricad-gitlab.univ-grenoble-alpes.fr/babylab-lpnc/video-coder'
documentation = 'https://gricad-gitlab.univ-grenoble-alpes.fr/babylab-lpnc/video-coder/-/blob/main/README.md'
repository = 'https://gricad-gitlab.univ-grenoble-alpes.fr/babylab-lpnc/video-coder'