Consider some improvements to WPT dash

I guess it is within our charter to deal with the BSF chart, but I assume that that also might include things related to it: For example, making that chart itself more understandable by linking an 'understanding this chart' link and linking to (at least what is queryable) somehow that the chart represents. But also, perhaps the idea that we should have other views. I've been thinking about this a lot and I've written a few posts about it. The last one looks at the idea of tracking/bubbling up data related to "universally passing tests" - see https://bkardell.com/blog/WPT-Dashboard.html

I think this could be interesting and helpful for helping us align and accomplish a lot, as well as portray a kind of 'score' that is similar to BSF, but aimed differently: How well are we working together over time? I think that is a pretty interesting and important metric too.

(related to #270)

Start with the linked WPT Dashboard post and related issue #270 to understand the proposed chart links, alternate views, and collaboration metric. The issue does not identify files, tests, or a single implementation target; a concrete scope and agreed acceptance criteria would be needed before work could begin.