feat: Add inbox view under feature flag on the sidebar (#9049)

Co-authored-by: Pranav <pranav@chatwoot.com>

app/javascript/dashboard/components/layout/config/sidebarItems/primaryMenu.js

@@ -2,6 +2,15 @@ import { FEATURE_FLAGS } from '../../../../featureFlags';
 import { frontendURL } from '../../../../helper/URLHelper';
 
 const primaryMenuItems = accountId => [
+  {
+    icon: 'mail-inbox',
+    key: 'inboxView',
+    label: 'INBOX_VIEW',
+    featureFlag: FEATURE_FLAGS.INBOX_VIEW,
+    toState: frontendURL(`accounts/${accountId}/inbox-view`),
+    toStateName: 'inbox_view',
+    roles: ['administrator', 'agent'],
+  },
   {
     icon: 'chat',
     key: 'conversations',