Basemap selector, labels/shaded toggle, projection-aware basemap switching, and useAsBasemap layer property. Use the buttons below each map to dynamically change basemap options via the API.
Test plan: 04-basemap.md
Use the basemap selector (navbar) to cycle through types. Use the buttons to toggle labels and shading dynamically.
Verify the same basemap types render correctly in WM. Switch projection on Map 1 and compare.
useAsBasemap: trueEPSG:3573 has no default basemaps. This map uses a WMTS layer with useAsBasemap: true as the basemap.