test: Add browser tests for the media viewing gallery and viewer (#2661)

yarn.lock

@@ -2465,6 +2465,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@webcomponents/scoped-custom-element-registry@npm:0.0.10":
+  version: 0.0.10
+  resolution: "@webcomponents/scoped-custom-element-registry@npm:0.0.10"
+  checksum: 10c0/97fdb174f6795b20a3f6e8af9018b6c3e48c6a2bf40b87ef606d9b4616df32b0dc67a085f8ca1fda0e4327b3237ae76626bf1bbea3cfea0e03ce743f915a39cc
+  languageName: node
+  linkType: hard
+
 "a-sync-waterfall@npm:^1.0.0":
   version: 1.0.1
   resolution: "a-sync-waterfall@npm:1.0.1"
@@ -2552,6 +2559,7 @@ __metadata:
     "@use-gesture/vanilla": "npm:^10.3.1"
     "@vitest/browser-playwright": "npm:4.1.10"
     "@vitest/coverage-v8": "npm:^4.1.10"
+    "@webcomponents/scoped-custom-element-registry": "npm:0.0.10"
     any-date-parser: "npm:^2.2.0"
     component-emitter: "npm:^1.3.1"
     compute-scroll-into-view: "npm:^3.1.1"