The Woo Add Product Tab widget was removed from the Pro plugin — the
Custom Product Tabs widget now covers single-tab use and can show/hide
custom tabs per product by taxonomy. Delete its user/marketing docs,
scrub references from getting-started and the overview, and document the
new Show On taxonomy visibility in the Custom Product Tabs guide.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
