Headings init

...lers/admin/communication/blocks/application_controller.rb

...rollers/admin/communication/blocks/headings_controller.rb

app/controllers/admin/communication/blocks_controller.rb

app/models/ability.rb

app/models/communication/block.rb

app/models/communication/block/heading.rb

app/models/concerns/with_blocks.rb

app/models/university/with_communication.rb

app/services/polymorphic.rb

app/views/admin/communication/blocks/_list.html.erb

app/views/admin/communication/blocks/headings/_form.html.erb

app/views/admin/communication/blocks/headings/edit.html.erb

app/views/admin/communication/blocks/headings/new.html.erb

config/locales/communication/en.yml

config/locales/communication/fr.yml

config/routes/admin/communication.rb

...ate/20230321082433_create_communication_block_headings.rb

db/schema.rb