How to duplicate Category, create subcategory or parallel list [CB v4.1]


#1

Hi,
I would like to duplicate the Category that appears below each video, for example to use it as a sub-category or a new set to be added separately, so I would like to create a new parallel list in the database, a new CB function and so on by talking about linked to the Category function. Could you tell me which documentation to refer to in order to develop a plugin specifically?

I found this https://clipbucket.com/docs/getting-started-with-plugins/
https://clipbucket.com/docs/how-to-create-new-database-table-on-clipbucket-plugin-installation/
How do I create a new function in CB v4.1? Do you give me advice on where to look to copy the Category and create a new one?

Thanks