chore: Move agent availability to Account level (#3074)

- Move agent availability to the account level

config/routes.rb

@@ -40,7 +40,7 @@ Rails.application.routes.draw do
             resource :contact_merge, only: [:create]
           end
 
-          resources :agents, except: [:show, :edit, :new]
+          resources :agents, only: [:index, :create, :update, :destroy]
           resources :agent_bots, only: [:index, :create, :show, :update, :destroy]
 
           resources :callbacks, only: [] do
@@ -159,7 +159,11 @@ Rails.application.routes.draw do
         resources :webhooks, only: [:create]
       end
 
-      resource :profile, only: [:show, :update]
+      resource :profile, only: [:show, :update] do
+        member do
+          post :availability
+        end
+      end
       resource :notification_subscriptions, only: [:create]
 
       namespace :widget do