message: docs: add documentation for record.addRecords
diff: - [addRecord](#addRecord)
  - [updateRecord](#updateRecord)
  - [getRecords](#getRecords)
  +- [addRecords](#addRecords)
  ## Overview
  @@ -118,3 +119,25 @@ Retrieves details of multiple records from an App by specifying the App ID and a
  #### Reference
  - https://developer.kintone.io/hc/en-us/articles/360019245194
  +
  +### addRecords
  +
  +Adds multiple records to an App.
  +
  +#### Parameters
  +
  +| Name | Type | Required | Description |
  +| ---------- | :--------------: | :------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  +| app | Number or String | Yes | The App ID. |
  +| records | Array | Yes | Holds an array of record objects, that contains field codes and their values.<br />Fields that are not included in the objects are added with their default value. Objects containing field codes that do not exist are ignored. For field type specs, check the [Field Types](https://developer.kintone.io/hc/en-us/articles/212494818/) page.
  +
  +#### Returns
  +
  +| Name | Type | Description |
  +| ---------- | :----: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
  +| ids | Array\<String\>| The Record IDs of the created records.
  +| revisions| Array\<String\>| The revision numbers of the records.
  +
  +#### Reference
  +
  +- https://developer.kintone.io/hc/en-us/articles/360000313321
  