feat(scenes): render the data-pack attribution cards from a store

The data-pack presentations keep the Cesium resources, object URLs and
pick targets and present each pack's attribution card, with its media
player, to the gev-data-packs store; the DataPacks view teleports one
panel per set of presentations into the viewer's container with the same
markup and inline styles, and stops a removed card's player as it goes.

scripts/format-scope.json

@@ -1134,5 +1134,7 @@
   "src/ui/toast.js",
   "src/ui/toastView.test.mjs",
   "src/ui/stores/sceneInteractions.js",
+  "src/scenes/dataPacks/presentationView.test.mjs",
+  "src/ui/stores/dataPacks.js",
   "src/scenes/interactionsView.test.mjs"
 ]