318 - Add GA custom event for Email Subscription to DOM elements

[nozomione]

Issue Number

Closing #318

Purpose/Implementation Notes

• Add custom events for email subscription to DOM elements using the GA custom events script
• Verified that custom events are firing correctly in the development environment

To see the email subscription custom GA4 reports, please login to CCDL Analytics account, and navigate to the development property Refine.bio Web - Dev (issue https://github.com/AlexsLemonade/refinebio-web/issues/310).

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• [x] Lint and unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [ ] Any dependent changes have been merged and published in downstream modules

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Name	Status	Preview	Comments	Updated (UTC)
refinebio-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 16, 2024 11:10pm

[nozomione]

This PR is ready for your review, thank you David!

[nozomione]

This PR was approved on 9/11, so I am going to merge it, thank you!