chore: Clean up unused files, imports, and work on getting end-to-end tests and unit tests running (#2272)

platform/viewer/cypress/fixtures/example.json

@@ -0,0 +1,5 @@
+{
+  "name": "Using fixtures to represent data",
+  "email": "hello@cypress.io",
+  "body": "Fixtures are a great way to mock data for responses to routes"
+}