Add CartJS catalog request creation snippet

[selvarun-umass]

This PR adds a code snippet for creating Service Catalog requests programmatically using CartJS API.

Purpose:

• Automate catalog request creation from server-side scripts
• Useful for workflows, integrations, and bulk operations

What's included:

• README.md with description and use cases
• cartjs_create_request.js with working examples

Testing:

Tested in dev instance via background script - successfully created catalog requests.

Location:

Server-Side Components/Server Side/Create Catalog Request Programmatically/

Checklist:

• Code tested in ServiceNow environment
• Relevant to ServiceNow developers
• Proper folder structure
• Includes README documentation
• No sensitive information
• No XML exports

[rohi-v]

Hi @selvarun-umass

Thank you for your submission.

CartAPI is available in docs and there are few examples in our repo too.

For Hacktoberfest, we’re aiming for high-quality contributions providing real-world developer usecases. Since this is your first PR, we’ve labeled it as hacktoberfest-accepted so it still counts toward your Hacktoberfest progress.

You can check some of the recently merged code snippets for reference. They are good examples of what we're aiming for.