🐛 Megamenu - Redundant calls to API that overwrites local data

Describe the Bug

For our SSW.Website, JSON data generated by TinaCMS is added as a param (i.e menuBarItems) . However, the current implementation calls ssw.com.au/api/get-megamenu regardless of the parameters, leading to overwritten props data.

To Reproduce

Steps to reproduce the behavior:

1. Install this as a library
2. Use MegaMenuLayout and pass the prop called menuBarItems

Expected Behavior

It should not call the API if the menuBarItems has data

Tasks

• Avoid the API call if the menuBarItems is already provided
• Update REAMDE for NextJS project as it may not run directly due to Server Side Rendering
• Add ClassName props as an optional prop to add customizable anchor links styling

Ideally, we should export types such as iconMap and other types used for the website's TinaCMS schema, rather than keeping them within the website itself.

Thanks!

Start at the MegaMenuLayout entry point and reproduce the issue by passing populated menuBarItems while using the library. Trace the megamenu API request and verify that it is skipped when local data is provided; also review the README guidance for NextJS server-side rendering.