chore: Add controllers for conversation participants (#6462)

Co-authored-by: Aswin Dev P.S <aswindevps@gmail.com>
Co-authored-by: Sojan Jose <sojan@chatwoot.com>

config/routes.rb

@@ -77,6 +77,7 @@ Rails.application.routes.draw do
               resources :messages, only: [:index, :create, :destroy]
               resources :assignments, only: [:create]
               resources :labels, only: [:create, :index]
+              resource :participants, only: [:show, :create, :update, :destroy]
               resource :direct_uploads, only: [:create]
             end
             member do