Get rolling with Speedata Publisher

[alerque]

This includes a working example with Speedata, but it currently only works for me locally with a modified path to include the upstream binary project bundle. There doesn't seem to be any distro packaging at all much less a Nix flake or even an install target (reported upstream) or release tags (reported upstream) to get started making one from source.

I'm not quite sure how we'll go about getting this running in CI yet, hence the draft mode until that part gets figured out.

This also uses dummy data because I haven't figured out how we'll layout multiple input files per example here yet, but whet that is worked out the data element should move to a separate file to be idiomatic of Speedata Publisher's typical workflow.