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.field.node.section_page.field_site_section.yml

@@ -11,8 +11,8 @@ id: node.section_page.field_site_section
 field_name: field_site_section
 entity_type: node
 bundle: section_page
-label: 'Site Section'
-description: 'Select the site section this page belongs to.'
+label: 'Seção do Site'
+description: 'Selecione a seção do site à qual esta página pertence.'
 required: true
 translatable: false
 default_value: {  }