can create and send emergency communications

app/controllers/server/emergency_messages_controller.rb

app/mailers/notification_mailer.rb

app/models/communication/extranet.rb

app/models/emergency_message.rb

app/models/user.rb

app/views/mailers/notifications/emergency_message.html.erb

app/views/server/emergency_messages/_form.html.erb

app/views/server/emergency_messages/edit.html.erb

app/views/server/emergency_messages/index.html.erb

app/views/server/emergency_messages/new.html.erb

app/views/server/emergency_messages/show.html.erb

config/locales/en.yml

config/locales/fr.yml

config/routes/server.rb

config/server_navigation.rb

db/migrate/20230717132026_create_emergency_messages.rb

db/schema.rb

test/fixtures/communication/extranets.yml