Megamenu page-tree panels; generic slug normaliser

- evo_megamenu_json: new entry layout "pagetree" - the panel columns
  mirror the live subtree of the page the entry links to (one child per
  column, grandchildren as items, getMenu() restrictions apply), so the
  menu can never age against the page structure again. The stale
  9-market panel after the markets realign was the trigger. Curated
  columns are ignored on this layout; teasers and the featured slot
  stay editorial. Same columns shape in the payload - front ends need
  no change beyond knowing the new layout string
- new vitec:normalize-slugs --root=<slug> [--style=plain|and]:
  recursively realigns every slug below a root to
  <parent-slug>/<slugified-title>, cascading, with a sibling-collision
  warning; EXT:redirects covers the old URLs. TYPO3's slug generator
  keeps slashes from page titles (third hit: rtcc-/-rtic), this sweeps
  a whole tree. Run on /solutions: four fixes, including the
  long-standing passenger page and solution page 467. The misspelled
  "engagament" slug stays deliberately - it follows the page title and
  is fixed in the coordinated typo task

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

packages/evo_megamenu_json/Resources/Private/Language/locallang_db.xlf

@@ -25,6 +25,7 @@
       <trans-unit id="tx_evomegamenujson_entry.layout.columns"><source>Columns</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.layout.teasers"><source>Link column plus teaser cards</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.layout.catalog"><source>Catalog (data-driven: categories and items from the site package, teaser cards as featured tiles)</source></trans-unit>
+      <trans-unit id="tx_evomegamenujson_entry.layout.pagetree"><source>Page tree (data-driven: one column per child of the linked page, its children as items; curated columns are ignored)</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.menu_columns"><source>Columns</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.menu_columns.description"><source>One column per group. In the teaser layout only the first column is rendered, next to the cards.</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.menu_teasers"><source>Teaser cards</source></trans-unit>