Add expandNewsletterSection Boolean to Pelcro.uiSettings

Problem

Currently, the newsletter section behavior is not configurable through Pelcro.uiSettings. Clients need a way to control whether the newsletter section should be expanded by default.

User Story

As a client using Pelcro UI, I want to configure whether the newsletter section is expanded by default, so that I can control the user experience based on my site’s needs.

DOD

• Add a new Boolean setting: expandNewsletterSection.

• The setting should be available under Pelcro.uiSettings.

• When expandNewsletterSection = true, the newsletter section should be expanded by default.

• When expandNewsletterSection = false or not provided, the newsletter section should keep the current/default behavior.

• Ensure the change does not break existing UI settings.