[ Feature request ]: Add support of banned-players.json

[FoPPi]

Add Feature with banned players list.

Here is an example of structure

banned-players = {
      username1 = {
            created = "2025-07-29 15:10:12 +0000";
            uuid = "someuuid";
            expires = "forever"; # forever or date like 2025-07-29 15:10:12 +0000
            reason = "Banned by an operator.";
          };
      username2 = {...}
}