Feature Request: Add unicode normalization function as $util.text.normalize for VTL

I want to do unicode normalization before creating DynamoDB records.
Unfortunately, I couldn't find that functionality in $util library.
https://docs.aws.amazon.com/appsync/latest/devguide/resolver-util-reference.html
Unicode normalization is important for dealing non-alphabetic languages. So I request the feature.

The issue provides no repository file, test, or entry point; begin with the linked AWS AppSync resolver utility reference and locate how VTL $util.text functions are defined. Done means supporting $util.text.normalize for Unicode normalization before creating DynamoDB records, with the expected behavior established for non-alphabetic languages.

Written by the indexing model from the issue text.