crm_core-8.x-3.x-dev/modules/crm_core_contact/crm_core_contact.links.action.yml

crm_core_individual.add:
  route_name: entity.crm_core_individual.add_page
  title: 'Add an individual'
  appears_on:
    - entity.crm_core_individual.collection

crm_core_organization.add:
  route_name: entity.crm_core_organization.add_page
  title: 'Add an organization'
  appears_on:
    - entity.crm_core_organization.collection

entity.crm_core_individual_type.add_form:
  route_name: entity.crm_core_individual_type.add_form
  title: 'Add individual type'
  appears_on:
    - entity.crm_core_individual_type.collection

entity.crm_core_organization_type.add_form:
  route_name: entity.crm_core_organization_type.add_form
  title: 'Add organization type'
  appears_on:
    - entity.crm_core_organization_type.collection