Add Nestedset plugin

[Wsmallnews]

• A new filament panel plugin: Nestedset
• Add a new author: wsmallnews

[saade]

Hey! Thanks for your contribution!

We noticed that your plugin image is just a basic screenshot of a form field. To make your plugin stand out, we recommend improving the image by showcasing the plugin’s functionality more clearly. You can include the plugin name, a brief description, or an illustrative representation of what your plugin does rather than just a form field screenshot.

A good plugin image helps users understand its purpose at a glance and makes it more appealing. Let us know once you’ve made these improvements. Thanks!

[Wsmallnews]

Thank you for your reply，I have updated the image of the plugin

• Plugin image: Replaced the basic screenshot with an improved image that better showcases the plugin's functionality

Please let me know if any further changes are needed. Thanks!