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

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

config/routes.rb

@@ -74,6 +74,7 @@ Rails.application.routes.draw do
             post :execute, on: :member
           end
           resources :sla_policies, only: [:index, :create, :show, :update, :destroy]
+          resources :custom_roles, only: [:index, :create, :show, :update, :destroy]
           resources :campaigns, only: [:index, :create, :show, :update, :destroy]
           resources :dashboard_apps, only: [:index, :show, :create, :update, :destroy]
           namespace :channels do