feat: APIs for Integration Hooks (#2250)

- Introduces JSON Schema validations via JSONSchemer
- Add CRUD APIs for integration hooks

config/routes.rb

@@ -121,6 +121,7 @@ Rails.application.routes.draw do
           resources :webhooks, except: [:show]
           namespace :integrations do
             resources :apps, only: [:index, :show]
+            resources :hooks, only: [:create, :update, :destroy]
             resource :slack, only: [:create, :update, :destroy], controller: 'slack'
           end
           resources :working_hours, only: [:update]