fix(runtime-tests): use ignorePatterns for lint, not the invalid exclude

`lint.exclude` is not a property of OxlintConfig (the correct key is
`ignorePatterns`). The invalid property failed defineConfig overload
resolution, which surfaced as a TS2769 plus a TS2321 excessive-stack-depth
error against the recursive vitest-augmented UserConfig. Using
`ignorePatterns` excludes the PTY fixtures from lint as intended and clears
both config type errors.

packages/runtime-tests/vite.config.ts

@@ -11,7 +11,7 @@ export default defineConfig({
   },
   lint: {
     options: { typeAware: true, typeCheck: true },
-    exclude: ["integration/pty/fixtures/**"],
+    ignorePatterns: ["integration/pty/fixtures/**"],
   },
   fmt: {},
 });