Ensure every page has good front matter

[mark-wiemer]

Ordering can get wonky if page front matter is missing from some pages but added in others. Ideally, we enforce front matter consistency via some CI pipeline check

[rollerozxa]

I've gone through and given every page a proper front matter with title, but having it enforced by Hugo would be nice. Otherwise if the page ordering is messed up then that is a clear sign to a human that a front matter was missed.

[mark-wiemer]

https://gohugo.io/functions/fmt/errorf/