API: Expose an APIs to manage plugin user whitelist

[EkimoCode]

The whitelist can be active or not for single plugin

Tasks

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1. Add new table one to many from plugin to list of emails (only one text)
2. Return in plugin object if the whitelist is active or not (you can deduct from the table above)
3. Add the api to get list of users in whitelist for plugin
4. Add the api to add of users (list of email)
5. Add the api to delete on or more users

Tasks

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1. Add endpoint to copy cross plugin id (remember to check if starting plugin and end plugin have the same user)

[ElSalvo96]

To add and delete, it is necessary to take an array list of emails and not only one.
In the future, we can also imagine that someone wants to copy an entire list of users. We can expose one API for that, or we can do this on the frontend (call the get list for another plugin and call add list for the actual plugin).