feat(whats-new): Add feature flag (#76819)

src/sentry/features/temporary.py

@@ -510,6 +510,8 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:widget-viewer-modal-minimap", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enabled unresolved issue webhook for organization
     manager.add("organizations:webhooks-unresolved", OrganizationFeature, FeatureHandlerStrategy.OPTIONS, api_expose=True)
+    # Display the new 'what's new' experience
+    manager.add("organizations:what-is-new-revamp", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # NOTE: Don't add features down here! Add them to their specific group and sort
     #       them alphabetically! The order features are registered is not important.