Add configuration and instructions to install via the Proto toolchain manager

[agdphd]

The Proto toolchain manager is pretty handy for managing tools like geoipupdate, and I'm currently considering it adopting it in a large monorepo at my job. Adding this YAML file to the repo makes it easy to integrate the tool.

If/once this is merged, I'll send a PR to the Moonrepo folks to add this to the Proto tool registry.

[horgh]

Thanks! I hadn't heard of Proto before.

I am not necessarily opposed to merging this. However I'm wondering if putting it in a repo like https://github.com/appthrust/proto-toml-plugins would make more sense. Glancing through the third party tools on the page you linked to, many seem to be in a Proto specific repo like that. What do you think? I'm mostly concerned about maintenance.

[agdphd]

That could work, though I'm not personally affiliated with any such repo, so I'd need to either set one up or find one that accepts public contributions.

Thinking about maintenance, one advantage of having the config here is that it keeps it close to the source of truth for the download_file and archive_prefix schemas; if y'all ever change the structure of the release archives or version numbers, you could then also change the Proto config if you think of it or review a PR from a user who notices the problem.