test: relocate Cypress e2e suite to e2e/ ahead of Playwright migration

Pure file moves (no content changes) so git records them as renames and
history/blame is preserved through the migration that follows:
  cypress/e2e/*.cy.ts        -> e2e/*.spec.ts
  cypress/e2e/*-driver.ts    -> e2e/*-driver.ts
  cypress/fixtures/          -> e2e/fixtures/
  cypress.config.ts          -> playwright.config.ts
  InputAutocomplete.cy.tsx   -> InputAutocomplete.browser.test.tsx

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

playwright.config.ts

@@ -0,0 +1,41 @@
+import { defineConfig } from "cypress";
+import { createRequire } from "module";
+const require = createRequire(import.meta.url);
+
+export default defineConfig({
+  env: {
+    codeCoverage: {
+      exclude: "cypress/**/*.*",
+    },
+  },
+
+  e2e: {
+    setupNodeEvents(on, config) {
+      // implement node event listeners here
+      require("@cypress/code-coverage/task")(on, config);
+      on("before:browser:launch", (browser, launchOptions) => {
+        if (browser.family !== "chromium") {
+          return;
+        }
+        launchOptions.args.push("--disable-gpu");
+        launchOptions.args.push("--enable-features=AllowSwiftShaderFallback,AllowSoftwareGLFallbackDueToCrashes");
+        launchOptions.args.push("--enable-unsafe-swiftshader");
+        return launchOptions;
+      });
+      return config;
+    },
+    baseUrl: "http://localhost:8888",
+    scrollBehavior: "center",
+    retries: {
+      runMode: 2,
+      openMode: 0,
+    },
+  },
+
+  component: {
+    devServer: {
+      framework: "react",
+      bundler: "vite",
+    },
+  },
+});