Add Rudderstack (customer data platform)

[tomilagom]

A customer data platform like rudderstack https://github.com/rudderlabs/rudder-server?tab=readme-ov-file
would be great to have as an alternative.
There are other open source options that are good but rudderstack is the most common

What is a CDP
https://www.rudderstack.com/blog/what-is-a-customer-data-platform-cdp/

Unlike traditional data management tools, a CDP is designed to eliminate data silos by aggregating and organizing data from multiple first and third-party data sources to create these complete customer profiles. Once the profiles are created, the CDP makes them available – within the CDP itself or downstream systems – to unlock better data analytics, audience segmentation, personalized marketing, machine learning, and more.