feat: shopify data source

[jcountsNR]

Summary

Added a shopify data source. This is just for reference for the data source in the Marketplace repo which has not merged yet. The full steps of inserting the browser agent code will be there.

The owners of this repo are not experts in the subject matter of the quickstarts. We review for the quickstart to be functional and for security risks. If you are seeking feedback on the content of the quickstart, please seek out a subject matter expert. If you are not an internal NR contributor, we can do our best to connect you with a content reviewer.

Pre merge checklist

• Did you check you NRQL syntax? - Does it work?
• Did you include a Data source and Documentation reference?
• Are all documentation links publicly accessible?
• Did you check your descriptive content for voice and tone?
• Did you check your descriptive content for spelling and grammar errors?
• Did you review your content with a subject matter expert? (e.g. a Browser agent quickstart is reviewed with a member of the Browser Agent team)

Dashboards

• Does the PR contain a screenshot for each of your dashboards?
• Do your screenshots show data?
• Has the sanitization script been run on each dashboard?

Alerts

• Did you check that your alerts actually work?

[github-actions]

Thank you for your contribution, our team will be reviewing this shortly, please be available for any follow up questions or code review feedback!