Update AI Architecture - new diagram and introduction
What does this MR do and why?
This MR is the first iteration of the planned update to the AI Architecture document. gitlab-com/content-sites/handbook!4004 (comment 1797093264)
This MR only replaces the PNG diagram with a Mermaid diagram and restructures the introduction to the document.
- Diagram before: https://gitlab.com/gitlab-org/gitlab/-/blob/e04dea5de54d57843fdd6a52b2ef0dc733a6ddd5/doc/development/ai_architecture.md#ai-architecture
- Diagram after: https://gitlab.com/gitlab-org/gitlab/-/blob/tv/2024-03/ai-architecuture-first/doc/development/ai_architecture.md#introduction
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Edited by Tomas Vik