feat: 添加插件前缀获取

Signed-off-by: 502647092 <admin@yumc.pw>

src/main/java/pw/yumc/YumCore/bukkit/Log.java

@@ -75,6 +75,13 @@ public class Log {
         }
     }
 
+    /**
+     * @return 获得插件前缀
+     */
+    public static String getPrefix() {
+        return prefix;
+    }
+
     /**
      * Log an INFO message.
      * <p>