Add documentation about AI Context and standardized instrumentation

Problem

The standardized method for instrumenting DAP events should be documented.

Desired Outcome

A page is added to https://docs.gitlab.com/development/internal_analytics/internal_event_instrumentation/. It should have the same structure as https://docs.gitlab.com/development/internal_analytics/internal_event_instrumentation/standard_context_fields/ and describe all the fields in the 1.0.0 version of the AI context.

Use relevant information from the epic.

Potential Solution

Documentation Update Needed

• Yes
• No

How to verify

Further actions needed