feat(appkit): auto-start app under test for agent evals (stack 6/6)

apps/dev-playground/evals.config.ts

@@ -0,0 +1,15 @@
+import { defineEvalConfig } from "@databricks/appkit/beta";
+
+/**
+ * Root eval config for the dev-playground. `webServer` lets `appkit agent eval`
+ * boot the app on demand (reusing an already-running dev server) instead of
+ * requiring it to be started by hand.
+ */
+export default defineEvalConfig({
+  baseUrl: "http://localhost:8000",
+  webServer: {
+    // Monorepo fixture command; a template project would use `npm run dev`.
+    command: "pnpm --filter=dev-playground dev",
+    timeoutMs: 90_000,
+  },
+});