Copy Variable Set Utility

[dvn-lazywinner]

PR Description:

This PR is to add a "Copy Variable Set" utility available as a Form Action on a Variable Set form which allows to copy a whole variable set alongwith the variables, client scripts, ui policies, policy actions etc.

Pull Request Checklist

Overview

• Put an x inside of the square brackets to check each item.
• [ x] I have read and understood the CONTRIBUTING.md guidelines
• [ x] My pull request has a descriptive title that accurately reflects the changes and the description has been filled in above.
• [ x] I've included only files relevant to the changes described in the PR title and description
• [ x] I've created a new branch in my forked repository for this contribution

Code Quality

• [ x] My code is relevant to ServiceNow developers
• [ x] My code snippets expand meaningfully on official ServiceNow documentation (if applicable)
• [ x] I've disclosed use of ES2021 features (if applicable)
• [ x] I've tested my code snippets in a ServiceNow environment (where possible)

Repository Structure Compliance

• [ x] I've placed my code snippet(s) in one of the required top-level categories:
  • Core ServiceNow APIs/
  • Server-Side Components/
  • Client-Side Components/
  • Modern Development/
  • Integration/
  • Specialized Areas/
• [ x] I've used appropriate sub-categories within the top-level categories
• [ x] Each code snippet has its own folder with a descriptive name

Documentation

• [ x] I've included a README.md file for each code snippet
• [ x] The README.md includes:
  • Description of the code snippet functionality
  • Usage instructions or examples
  • Any prerequisites or dependencies
  • (Optional) Screenshots or diagrams if helpful

Restrictions

• [ x] My PR does not include XML exports of ServiceNow records
• [ x] My PR does not contain sensitive information (passwords, API keys, tokens)
• [ x] My PR does not include changes that fall outside the described scope