feat(apps): Shopify Integration (#11101)

This PR adds native integration with Shopify. No more dashboard apps.
The support agents can view the orders, their status and the link to the
order page on the conversation sidebar.

This PR does the following: 
- Create an integration with Shopify (a new app is added in the
integrations tab)
- Option to configure it in SuperAdmin
- OAuth endpoint and the callbacks.
- Frontend component to render the orders. (We might need to cache it in
the future)
---------

Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/controllers/super_admin/app_configs_controller.rb

@@ -35,6 +35,8 @@ class SuperAdmin::AppConfigsController < SuperAdmin::ApplicationController
     @allowed_configs = case @config
                        when 'facebook'
                          %w[FB_APP_ID FB_VERIFY_TOKEN FB_APP_SECRET IG_VERIFY_TOKEN FACEBOOK_API_VERSION ENABLE_MESSENGER_CHANNEL_HUMAN_AGENT]
+                       when 'shopify'
+                         %w[SHOPIFY_CLIENT_ID SHOPIFY_CLIENT_SECRET]
                        when 'microsoft'
                          %w[AZURE_APP_ID AZURE_APP_SECRET]
                        when 'email'