Synchronize project metadata with GitHub

[bswck]

Goal

Periodically synchronize metadata for each downstream project with its GitHub repository.

Motivation

Enhanced integration with GitHub, long-term host of all downstream OSS projects:

• More informative GitHub layout thanks to repository descriptions
• Better navigation: automatic project URLs (my suggestion is RTD links whenever possible—from the README docs badge?)
• Community flow: Discord webhooks tracked in Set up automatic Discord webhook registration #11
• GitHub Topics (those under the website URL—from Trove classifiers?)

@jaraco Have I included everything? 😀

---

Derived from discussions @ jaraco/pytest-perf#10.

[bswck]

I initially wanted to use GitHub CLI for achieving the goal, but after a closer inspection I am more into extending the jaraco.develop.github.GitHub class with methods implementing explicit API endpoint calls.

[bswck]

During project metadata synchronization, PyPI project URLs could also be maintained in setup.cfg.
It would probably be useful to see links to documentation or issue tracker right in PyPI project pages.

[jaraco]

Perhaps out of scope for this issue, but a related concern I'd like to consider (somewhere) is how to manage best practices in the GitHub project. For example, I find I need to configure these settings manually in each project:

Ideally, there'd be a centralized way to manage these settings across projects too. Perhaps the "org" hierarchy could provide better defaults and obviate the need to manage the settings across all projects.

[jaraco]

Perhaps the "org" hierarchy could provide better defaults and obviate the need to manage the settings across all projects.

Turns out this is not the case. Even after forming coherent-oss, I've found that these settings have to be set manually on each and every project.