[Add-On][Done] Gutenberg for Backpack with already-made fields, repeatable and multilanguage support

[AndreiTelteu]

Hi !

I created this plugin that uses VanOns/laraberg under the hood and allows you to create gutenberg blocks only using php.

https://github.com/customberg/customberg-php

To create a block you simply execute the command php artisan make:block SwiperHomepage for example. This creates a class where you have to declare what fields you want for this block (text, rich_text, color, upload_image, select, repeatable). You can also enable multilanguage on text and rich_text.
And we also create a block blade file where you can also push scripts and styles in a stack.

The source code for this demo you can find in the example folder. The example project also uses docker-compose and sqlite, this way is super easy to play with this project.

Note: The reason this project is called customberg-php and not customberg-for-backpack is because I plan to make this framework and admin-panel agnostic (meaning it will work in other admin panels and other frameworks as well). I'm not sure if I need separate packages for all admin-panels or I can keep everything under the same repo/package.