Add evo_megamenu_json extension and seed the megamenu

- new project-neutral extension evo_megamenu_json (Evomedien): a Megamenu
  plugin holding entries, columns, items, teaser cards and a featured slot
  as nested records; presentation settings travel with the payload so the
  front end reads behaviour instead of hard-coding it; published as
  page.10.fields.megaMenu, driven by the site settings megamenu.contentUid
  and megamenu.storagePid
- vitec:seed-megamenu fills one element from the live structure: 5 entries,
  26 columns, 95 items, 4 story cards; items without a page yet are flagged
  pending so the front end falls back to the column link
- vitec:debug-sets prints the resolved site set order
- read-only diagnostics: check_megamenu_schema.php, check_typoscript_templates.php
- docs: schema updates run via extension:setup (database:updateschema no
  longer exists in v14), and a JSON Accept header activates headless-mixed,
  which strips every set-added page field

packages/evo_megamenu_json/ext_tables.sql

@@ -0,0 +1,69 @@
+#
+# Megamenu entry - one item in the main navigation bar.
+# Child of the "Megamenu" plugin element (tt_content).
+#
+CREATE TABLE tx_evomegamenujson_entry (
+	parentid int(11) DEFAULT '0' NOT NULL,
+	parenttable varchar(255) DEFAULT '' NOT NULL,
+	title varchar(255) DEFAULT '' NOT NULL,
+	link varchar(1024) DEFAULT '' NOT NULL,
+	layout 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,
+	featured_kicker varchar(255) DEFAULT '' NOT NULL,
+	featured_title varchar(255) DEFAULT '' NOT NULL,
+	featured_text text,
+	featured_link varchar(1024) DEFAULT '' NOT NULL,
+	featured_image int(11) unsigned DEFAULT '0' NOT NULL,
+
+	KEY parent (parentid)
+);
+
+#
+# Column inside an entry - a headline plus its list of items.
+#
+CREATE TABLE tx_evomegamenujson_column (
+	parentid int(11) DEFAULT '0' NOT NULL,
+	title varchar(255) DEFAULT '' NOT NULL,
+	link varchar(1024) DEFAULT '' NOT NULL,
+	menu_items int(11) DEFAULT '0' NOT NULL,
+
+	KEY parent (parentid)
+);
+
+#
+# Item inside a column - the actual link line.
+#
+CREATE TABLE tx_evomegamenujson_item (
+	parentid int(11) DEFAULT '0' NOT NULL,
+	title varchar(255) DEFAULT '' NOT NULL,
+	link varchar(1024) DEFAULT '' NOT NULL,
+	teaser varchar(255) DEFAULT '' NOT NULL,
+	badge varchar(60) DEFAULT '' NOT NULL,
+	pending tinyint(1) unsigned DEFAULT '0' NOT NULL,
+	image int(11) unsigned DEFAULT '0' NOT NULL,
+
+	KEY parent (parentid)
+);
+
+#
+# Teaser card inside an entry - used by the "teasers" layout.
+#
+CREATE TABLE tx_evomegamenujson_teaser (
+	parentid int(11) DEFAULT '0' NOT NULL,
+	kicker varchar(255) DEFAULT '' NOT NULL,
+	title varchar(255) DEFAULT '' NOT NULL,
+	teasertext text,
+	link varchar(1024) DEFAULT '' NOT NULL,
+	image int(11) unsigned DEFAULT '0' NOT NULL,
+
+	KEY parent (parentid)
+);
+
+#
+# Plugin element holds its entries inline.
+#
+CREATE TABLE tt_content (
+	tx_evomegamenujson_entries int(11) DEFAULT '0' NOT NULL
+);