Megamenu: rail display for page trees, cache tags, editorial promo boxes

- Page-tree entries get a "Page tree display" field (columns | rail |
  rail-compact), emitted as display + cardSize: Markets and Solutions
  show their main pages as a list and the sub-pages as image cards on
  hover. Page-tree items carry image (page media) and teaser (abstract)
  from stage 2. Additive; front ends ignoring display render columns.
- vitec:attach-page-media gains --depth=2 and falls back to the page's
  hero background before the grey placeholder; the 39 sub-solution
  pages got their hero image as page media.
- MegamenuJsonRenderer tags every page carrying the menu with the menu
  tables and tt_content_<uid>, so saving menu records refreshes all
  pages instead of waiting for a full flush.
- Products catalog: drop catalog.news; both promo boxes ("Product
  highlight", "Product news") are the entry's editorial teaser cards.
  ProvideInsightsSpotlight back to its previous state.
- Spec v1.29 and v1.30 (header version corrected), README.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/evo_megamenu_json/ext_tables.sql

@@ -8,6 +8,7 @@ CREATE TABLE tx_evomegamenujson_entry (
 	title varchar(255) DEFAULT '' NOT NULL,
 	link varchar(1024) DEFAULT '' NOT NULL,
 	layout varchar(30) DEFAULT 'columns' NOT NULL,
+	tree_display varchar(30) DEFAULT 'columns' NOT NULL,
 	menu_columns int(11) DEFAULT '0' NOT NULL,
 	menu_teasers int(11) DEFAULT '0' NOT NULL,
 	featured_enable tinyint(1) unsigned DEFAULT '0' NOT NULL,