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/acf-frontend-form.md

@@ -0,0 +1,15 @@
+# ACF Frontend Form
+
+Let visitors edit Advanced Custom Fields content from the front end — no admin access, no wp-admin, just a form on your page.
+
+## The problem it solves
+
+Advanced Custom Fields is one of the most powerful tools in WordPress for structured content, but editing it has always meant going into wp-admin. For membership sites, directories, community-submitted content, or client self-service portals, that's a real barrier.
+
+## How it helps
+
+ACF Frontend Form renders ACF's own native form interface — the same tabs, repeaters, and field layouts you're used to from the admin edit screen — directly on any front-end page, for the post or page currently being viewed. Choose exactly which field groups are editable, and whether the post title and content are included too.
+
+## The result
+
+Genuine front-end content editing, using ACF's real, familiar form fields — not a simplified imitation.