feat: Add ability to resolve API channel conversations (#8348)

- Create a new endpoint to fetch a single conversation in client apis
- Create a new endpoint to resolve a single conversation in client apis
- Update swagger API definition to include missing endpoints

Fixes: #6329

Co-authored-by: Cristian Duta <Cristian.Duta@ti8m.ch>

config/routes.rb

@@ -366,8 +366,9 @@ Rails.application.routes.draw do
         resources :inboxes do
           scope module: :inboxes do
             resources :contacts, only: [:create, :show, :update] do
-              resources :conversations, only: [:index, :create] do
+              resources :conversations, only: [:index, :create, :show] do
                 member do
+                  post :toggle_status
                   post :toggle_typing
                   post :update_last_seen
                 end