seed project creator role

config/locales/en.yml

@@ -28,3 +28,6 @@ en:
   label_not_changeable: (not changeable)
   label_no_assignable_role: No global role available for assignment
   label_global: Global
+
+  seeders:
+    default_role_project_creator: 'Project creator'

lib/open_project/global_roles/engine.rb

@@ -32,6 +32,7 @@ module OpenProject::GlobalRoles
     assets %w(global_roles/global_roles.js)
 
     patches [:Principal, :Role, :User, :RolesController, :UsersController]
+    patch_with_namespace :BasicData, :RoleSeeder
 
     initializer 'patch helper' do
       require_relative 'patches/roles_helper_patch'

lib/open_project/global_roles/patches/role_seeder_patch.rb

@@ -0,0 +1,21 @@
+module OpenProject::GlobalRoles::Patches
+  module RoleSeederPatch
+    def self.included(base)
+      base.prepend InstanceMethods
+    end
+
+    module InstanceMethods
+      def roles
+        super + [project_creator]
+      end
+
+      def project_creator
+        { name: I18n.t(:'seeders.default_role_project_creator'),
+          position: 6,
+          permissions: [:add_project],
+          type: 'GlobalRole'
+        }
+      end
+    end
+  end
+end