add roles to admin panel

spec/factories/roles.rb

@@ -0,0 +1,18 @@
+# == Schema Information
+#
+# Table name: roles
+#
+#  id         :bigint           not null, primary key
+#  name       :string
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+# Indexes
+#
+#  index_roles_on_name  (name) UNIQUE
+#
+FactoryBot.define do
+  factory :role do
+    
+  end
+end