Allow no form or a Gravity Forms form in place of the built-in signup form
- Included the ability for admins to remove the built-in signup form from volunteer opportunities.
- Integrated with the Gravity Forms plugin to allow admins to replace the built-in signup form with a Gravity Forms form.
- Added Cypress end-to-end test coverage for some of the plugin's functionality.
- Tested up to WordPress 6.4.