Support for Google Analytics 4 Custom Events

[jonathanstegall]

Passing these events with standard gtag calls that work well in Universal Analytics does technically work in Google Analytics 4, but it is not very clean or usable.

Some resources to use:

• https://support.google.com/analytics/answer/11091026?hl=en#zippy=%2Cin-this-article
• https://www.napkyn.com/2021/02/22/google-analytics-4-tip-direct-dual-deployments-via-the-gtag-js-tagging-framework/
• https://ken-williams.com/guide/overview/migrating-tags-from-universal-analytics-to-ga4/#custom-event-tags
• https://ken-williams.com/guide/installation/5-best-practices-for-creating-your-events-and-parameters-in-a-google-analytics-4/
• https://www.bounteous.com/insights/2021/01/28/event-naming-considerations-google-analytics-4-properties/