[Audit] Create sample dashboard with equivalent visualizations for each authoring environment

[joshuarrrr]

In service of #2840, we need a single place where UX designers, engineers, and the community can see similar visualization as configured with their default values. This will allow us to both 1) identify which visualization elements or properties are most out of alignment for prioritization, and 2) track our visual unification progress over time, by comparing dashboard screenshots.