Add field_redirect_page to site_sections terms and fix root page hierarchy

- Add field_redirect_page to site_sections taxonomy terms, with a custom
  EntityReferenceSelection plugin that filters content_page nodes by section
- Redirect taxonomy term canonical URLs to the configured node (301)
- Fix root page detection in MenuBlock and views to also match nodes whose
  field_parent_page points to a taxonomy_term (not only empty parent)
- Move root taxonomy-term option to the top of the parent-page dropdown
- Add breadcrumb workaround for Gavias notech theme separator rendering
- Add imecc_menu_helper submodule
- Translate config labels and default terms from English to Portuguese

Co-Authored-By: Henrique Bauer <henrique@webcontent.com.br>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/install/field.storage.taxonomy_term.layout_builder__layout.yml

@@ -0,0 +1,19 @@
+uuid: 99f94609-3b7c-490e-80a0-96036b03e9d3
+langcode: pt-br
+status: true
+dependencies:
+  module:
+    - layout_builder
+    - taxonomy
+id: taxonomy_term.layout_builder__layout
+field_name: layout_builder__layout
+entity_type: taxonomy_term
+type: layout_section
+settings: {  }
+module: layout_builder
+locked: true
+cardinality: 1
+translatable: false
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false