Flatten marketing paths ahead of wiring up the websites

Drop the redundant documentation/marketing/ nesting inherited from the
plugin repos, so files sit at marketing/<plugin>/<page>.md. These paths
become raw URLs pasted into Elementor pages and ACF fields, so they are
much cheaper to change now than once sites reference them.

Fixes the four cross-plugin links for their new depth, and corrects the
README, which still pointed at the abandoned per-repo documentation/
folders instead of this repo.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

marketing/dotjuice-elementor-tools-pro/widgets/woo-cart.md

@@ -0,0 +1,15 @@
+# Woo Cart
+
+A complete, from-scratch cart widget — with instant AJAX quantity updates and deep styling control, no Elementor Pro required.
+
+## The problem it solves
+
+A store's cart page is one of the last steps before checkout, and default cart styling rarely matches the rest of a carefully designed store. Elementor Pro has its own cart widget, but if you're not on Elementor Pro, or you want more granular styling control than it offers, there's a gap.
+
+## How it helps
+
+Woo Cart is a ground-up cart widget: item rows with thumbnail, name, variation details, a quantity stepper, and pricing; a coupon box; and a totals panel with checkout button — all restyled through more than a dozen dedicated style sections. Switch on AJAX quantity updates and shoppers can adjust amounts without a page reload at all, with the totals panel updating live, including coupon and discount rows.
+
+## The result
+
+A cart experience that feels instant and looks exactly like the rest of your store, without needing Elementor Pro.