Add default related link restrictions

app/models/work_items/type.rb

...elopment/51_create_work_item_related_link_restrictions.rb

...duction/040_create_work_item_related_link_restrictions.rb

...0231005131445_add_work_items_related_link_restrictions.rb

db/schema_migrations/20231005131445

doc/development/work_items.md

...porters/work_items/related_links_restrictions_importer.rb

...opment/create_work_item_related_link_restrictions_spec.rb

...uction/create_work_item_related_link_restrictions_spec.rb

spec/factories/work_items/related_link_restrictions.rb

...rs/work_items/related_links_restrictions_importer_spec.rb

...grations/add_work_items_related_link_restrictions_spec.rb

spec/models/work_items/related_link_restriction_spec.rb

spec/models/work_items/type_spec.rb

...port/helpers/migrations_helpers/work_item_types_helper.rb

spec/support/helpers/test_env.rb

..._examples/work_item_related_link_restrictions_importer.rb