Add project files

e2e-tests/approve.spec.ts

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+import { testSkipIfWindows, Timeout } from "./helpers/test_helper";
+import { expect } from "@playwright/test";
+
+testSkipIfWindows("write to index, approve, check preview", async ({ po }) => {
+  await po.setUp();
+  await po.sendPrompt("tc=write-index");
+  await po.snapshotMessages();
+  await po.approveProposal();
+
+  // Should be slightly different from above, because it will say "approved"
+  await po.snapshotMessages();
+
+  // This can be pretty slow because it's waiting for the app to build.
+  await expect(po.getPreviewIframeElement()).toBeVisible({
+    timeout: Timeout.LONG,
+  });
+  await po.snapshotPreview();
+});