feat(common): 添加新的API

hamster-ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/api/BallAPI.java

@@ -737,6 +737,20 @@ public abstract class BallAPI {
         return null;
     }
 
+    /**
+     * 获取玩家的UUID
+     *
+     * @param playerName 玩家名次
+     * @return 玩家的UUID
+     */
+    public UUID getPlayerUUID(String playerName) {
+        BallPlayerInfo info = getPlayerInfo(playerName);
+        if (info == null) {
+            return null;
+        }
+        return info.getUuid();
+    }
+
     /**
      * 获取玩家名称
      *