Colo gha

[nathanaelhuffman]

Fixes #153
Fixes #141

This provides an initial stepping stone toward a more fully features CI and release process, where sims run and FPGA builds run for both cobble and buck2 based builds, with some simple filtering so we don't have to rebuild both sides of the world when something on only one of them changed.

There are a couple of minor edits to things to make the sims go, but no real design-functional changes in here, just CI infra.

I'd like to get this merged, so we can make these required checks going forward as they're providing value already.

We'll need to figure out the release process still, which we probably want some level of automation but likely want it to be on-demand vs a release every merge to main I'd think so it's easier to track down changes. As it is, you can go fishing through the uploaded artifacts for the things you want to submit and do manual submissions as needed, we just don't have a perma-link to the artifacts yet.

[Aaron-Hartwig]

🚀