[IS 7.0] Add instructions to configure localization for authentication and recovery endpoints

[AfraHussaindeen]

Purpose

• $Subject
• Related issue : https://github.com/wso2/product-is/issues/19529
• Documentation Content: Extracted and modified from the https://is.docs.wso2.com/en/5.11.0/develop/localization-support-in-identity-server.
• Reference Image: Refer to the following image for the updated documentation content view.