Add the placeholder to know the status of the player if they are a booster

[Unknow-Player-1]

Why?

In this way it is easy to manage bossters with external plugin conditions

What and How?

Using the placeholder on a player should return true or false, true if the player is a booster

INPUT: %discordsrv_user_bosster%
OUTPUT: true/no

Are there alternatives?

Exists only for permissions in luckperms but this cannot be handled with conditions

Checks

• I have used the search at least once to check if my idea has already been suggested and perhaps already implemented.

Anything else

No response