feat: Add APIs to manage custom roles in Chatwoot (#9995)

Co-authored-by: Pranav <pranavrajs@gmail.com>

spec/factories/custom_roles.rb

@@ -0,0 +1,8 @@
+FactoryBot.define do
+  factory :custom_role do
+    account
+    name { Faker::Name.name }
+    description { Faker::Lorem.sentence }
+    permissions { CustomRole::PERMISSIONS.sample(SecureRandom.random_number(4)) }
+  end
+end