feat: add 'GetPlayerServer' message type

Author: Timongcraft

docs/paper/dev/api/plugin-messaging.mdx

@@ -99,6 +99,7 @@ These are the following:
 | `Message`         | Sends a message to the specified player.               | `player name`, `message`                                         | N/A                                               |
 | `MessageRaw`      | Sends a raw chat component to the specified player.    | `player name`, `JSON chat component`                             | N/A                                               |
 | `GetServer`       | Returns the server the player is connected to.         | N/A                                                              | `server name`                                     |
+| `GetPlayerServer` | Returns the server name of the specified player.       | `player name`                                                    | `player name`, `erver name`                       |
 | `UUID`            | Returns the UUID of player.                            | N/A                                                              | `UUID`                                            |
 | `UUIDOther`       | Returns the UUID of the specified player.              | `player name`                                                    | `player name`, `UUID`                             |
 | `ServerIp`        | Returns the IP of the specified server.                | `server name`                                                    | `server name`, `IP`, `port`                       |