Docs - Update Data management page

[ivanagas]

Summary

explain what's needed and link to additional context

https://posthog.com/docs/data is one of the most popular docs pages (probably helped by the fact that is the second CTA on https://posthog.com/docs). It is relatively out of date, focuses a lot on "definitions" which are largely irrelevant now. Should talk about all the features included in data management now.

Likely to wait and update with PostHog/meta#139

What kind of request is this?

• New docs page / feature
• Update to existing page

Which product is this for?

• Product OS (e.g. platform features)
• Product analytics
• Session replay
• Feature flags
• A/B testing
• Surveys
• CDP
• Data warehouse
• Other (e.g. open source specific)

What's the priority?

• Urgent AND important ("great scott, this is horribly wrong / out of date")
• Important, but not urgent ("we need to do this, but not immediately")
• Non-urgent (this could be better / would be nice to have)

Is there a deadline for this change?

• Yes (please specify)
• No