Export permalink preview component for plugins. (#25609)

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/plugins/export.js

@@ -10,6 +10,7 @@ import ChannelInviteModal from 'components/channel_invite_modal';
 import ChannelMembersModal from 'components/channel_members_modal';
 import {openPricingModal} from 'components/global_header/right_controls/plan_upgrade_button';
 import {useNotifyAdmin} from 'components/notify_admin_cta/notify_admin_cta';
+import PostMessagePreview from 'components/post_view/post_message_preview';
 import PurchaseModal from 'components/purchase_modal';
 import StartTrialFormModal from 'components/start_trial_form_modal';
 import ThreadViewer from 'components/threading/thread_viewer';
@@ -91,6 +92,7 @@ window.Components = {
     StartTrialFormModal,
     ThreadViewer,
     CreatePost,
+    PostMessagePreview,
 };
 
 // This is a prototype of the Product API for use by internal plugins only while we transition to the proper architecture