chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/evals/vitest.test.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig, mergeConfig } from "vitest/config";
+import baseConfig, { workspaceSourcePaths } from "../../vitest.base.ts";
+
+export default mergeConfig(
+	baseConfig,
+	defineConfig({
+		test: {
+			include: ["test/**/*.test.ts"],
+		},
+		resolve: {
+			alias: [{ find: /^@earendil-works\/pi-coding-agent$/, replacement: workspaceSourcePaths.codingAgentIndex }],
+		},
+	}),
+);