Add acf-stubs.php + TestCase::setUp() require-after-Patchwork pattern so
acf_add_local_field_group is Patchwork-instrumented and re-interceptable
across FieldGroupTest and TermMetaTest in the same PHP process.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add patchwork.json to enable function_exists shimming via Patchwork
(required so Brain Monkey can intercept the PHP internal).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>