Calculate Due date using user defined schedules

[sivamuruganandam-coder]

PR Description:

This Script Include calculates a future due date by adding a specified number of business days to a given start date, based on a defined schedule. This can be used anywhere within the server side scripts like fix scripts, background scripts, UI Action (server script).

Pull Request Checklist

Overview

• I have read and understood the CONTRIBUTING.md guidelines
• My pull request has a descriptive title that accurately reflects the changes
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• I've created a new branch in my forked repository for this contribution

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• My code is relevant to ServiceNow developers
• My code snippets expand meaningfully on official ServiceNow documentation (if applicable)
• I've disclosed use of ES2021 features (if applicable)
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[ravichandra1998g]

looks good,
Thank you for the submission!