Use dict for project_url in inspect

[JakobDev]

What's the problem this feature will solve?

Currently project_url in the output of pip inspect has this format:

"project_url": [
    "Bug Reports, https://github.com/Ousret/charset_normalizer/issues",
    "Documentation, https://charset-normalizer.readthedocs.io/en/latest"
],

If you want to parse this, you first need to do a string split.

Describe the solution you'd like

This would be the better format:

"project_url": {
    "Bug Reports": "https://github.com/Ousret/charset_normalizer/issues",
    "Documentation": "https://charset-normalizer.readthedocs.io/en/latest"
},

Alternative Solutions

None

Additional context

None

Code of Conduct

• [X] I agree to follow the PSF Code of Conduct.

[sbidoul]

Hi!

Currently the output of pip inspect is based on standards. In the case of metadata, it is the JSON transformation that is specified in PEP 566.

For interoperability reasons, I think it is better to keep it that way, and let higher libraries provide convenience functions, depending on the use cases.

For instance, I think there is ongoing work in the packaging project to provide a library api to manipulate metadata, and it could be interesting to consider there if a convenience API to manipulate project URLs is worthwhile.