add menu parent blocks

district/migrations/0145_auto_20240509_1642.py

district/migrations/0217_alter_districthomepage_menu.py

district/templates/district/district_crossroad_page.html

donate/migrations/0048_alter_donatehomepage_menu.py

elections/migrations/0036_alter_electionshomepage_menu.py

main/migrations/0093_alter_mainhomepage_menu.py

package-lock.json

shared/blocks/base.py

shared/blocks/main.py

shared/models/main.py

shared/static/styleguide2/main.css

shared/static/styleguide2/main.js

shared/static/styleguide2/pirati-ui.svg

...es/styleguide2/includes/atoms/dropdown/dropdown_item.html

...tes/styleguide2/includes/molecules/dropdown/dropdown.html

...mplates/styleguide2/includes/organisms/layout/navbar.html