docs: 补充 HowToUse 参数文档，新增 5 个缺失参数

新增以下参数说明（中英文同步更新）：
- asyncCount: 异步 count 查询开关
- asyncCountParallelism: 异步 count 线程池大小
- countSqlParser: 自定义 count SQL 解析器
- orderBySqlParser: 自定义 ORDER BY SQL 解析器
- sqlServerSqlParser: 自定义 SqlServer 分页 SQL 解析器

将已移除的 sqlParser 参数改为删除线+引用格式，说明功能已拆分为三个独立参数。

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: abel533

wikis/en/HowToUse.md

@@ -343,8 +343,25 @@ When this parameter is set to `true`, the` offset` parameter in `RowBounds` is u
     adding `/*keep orderby*/` to all subqueries and can set it for a single operation in addition to the global
     configuration.
 
-21. `sqlParser`: configure JSqlParser parser, attention is `com.github.pagehelper.JSqlParser` interface, used to support
-    such as essentially a need for additional configuration.(**6.1.0 remove this parameter**)
+21. `asyncCount`: Default value is `false`. When set to `true`, count queries will be executed asynchronously,
+    which can improve overall pagination query efficiency. Can also be set for individual operations in addition to the global configuration.
+
+22. `asyncCountParallelism`: Thread pool size for async count queries, default value is `Runtime.getRuntime().availableProcessors() * 2`.
+    Only effective when `asyncCount=true`.
+
+23. `countSqlParser`: Configure a custom count SQL parser. Must implement the `com.github.pagehelper.parser.CountSqlParser` interface.
+    Set to the fully qualified class name of the implementation. Default is `DefaultCountSqlParser`. Replaces the count-related functionality
+    from the removed `sqlParser` parameter.
+
+24. `orderBySqlParser`: Configure a custom ORDER BY SQL parser. Must implement the `com.github.pagehelper.parser.OrderBySqlParser` interface.
+    Set to the fully qualified class name of the implementation. Default is `DefaultOrderBySqlParser`.
+
+25. `sqlServerSqlParser`: Configure a custom SqlServer pagination SQL parser. Must implement the `com.github.pagehelper.parser.SqlServerSqlParser` interface.
+    Set to the fully qualified class name of the implementation. Default is `DefaultSqlServerSqlParser`.
+
+> ~~`sqlParser`: Configure JSqlParser parser, which is the `com.github.pagehelper.JSqlParser` interface, used to support
+> sqlserver and other scenarios that need additional configuration. **This parameter was removed in 6.1.0**, and its functionality
+> has been split into three separate parameters: `countSqlParser`, `orderBySqlParser`, and `sqlServerSqlParser`.~~
 
 #### 6. How to choose Configure these parameters
 

wikis/zh/HowToUse.md

@@ -301,8 +301,23 @@ DEBUG [main] -
 
 20. `keepSubSelectOrderBy`：转换count查询时保留子查询的 order by 排序。可以避免给所有子查询添加 `/*keep orderby*/`，除全局配置外，可以针对单次操作进行设置。
 
-21. `sqlParser`：配置 JSqlParser 解析器，注意是 `com.github.pagehelper.JSqlParser` 接口，用于支持 sqlserver
-    等需要额外配置的情况(**6.1.0 移除该参数**)。
+21. `asyncCount`：默认值为 `false`。设置为 `true` 时，count 查询会异步执行，可以提高分页查询的整体效率。
+    除全局配置外，也可以针对单次操作进行设置。
+
+22. `asyncCountParallelism`：异步 count 查询的线程池大小，默认值为 `Runtime.getRuntime().availableProcessors() * 2`。
+    仅在 `asyncCount=true` 时有效。
+
+23. `countSqlParser`：配置自定义的 count SQL 解析器，需要实现 `com.github.pagehelper.parser.CountSqlParser` 接口，
+    配置为实现类的全限定名称。默认使用 `DefaultCountSqlParser`。用于替代已移除的 `sqlParser` 参数中 count 相关的功能。
+
+24. `orderBySqlParser`：配置自定义的 ORDER BY SQL 解析器，需要实现 `com.github.pagehelper.parser.OrderBySqlParser` 接口，
+    配置为实现类的全限定名称。默认使用 `DefaultOrderBySqlParser`。
+
+25. `sqlServerSqlParser`：配置自定义的 SqlServer 分页 SQL 解析器，需要实现 `com.github.pagehelper.parser.SqlServerSqlParser` 接口，
+    配置为实现类的全限定名称。默认使用 `DefaultSqlServerSqlParser`。
+
+> ~~`sqlParser`：配置 JSqlParser 解析器，注意是 `com.github.pagehelper.JSqlParser` 接口，用于支持 sqlserver
+> 等需要额外配置的情况。**该参数已在 6.1.0 中移除**，相关功能已拆分为 `countSqlParser`、`orderBySqlParser` 和 `sqlServerSqlParser` 三个独立参数。~~
 
 **重要提示：**