Add optimized-powered-rails config comment

Author: Dreeam-qwq

leaf-server/src/main/java/org/dreeam/leaf/config/modules/opt/OptimizedPoweredRails.java

@@ -13,6 +13,13 @@ public String getBasePath() {
 
     @Override
     public void onLoaded() {
-        enabled = config.getBoolean(getBasePath(), enabled);
+        enabled = config.getBoolean(getBasePath(), enabled,
+            config.pickStringRegionBased(
+                """
+                    Whether to use optimized powered rails.
+                    The implementation is based on RailOptimization made by GitHub@FxMorin""",
+                """
+                    是否使用铁轨优化。
+                    优化实现基于 GitHub@FxMori 的 RailOptimization 模组。"""));
     }
 }