Move Optimization Detective docs into `README.md`#1763

Merged

westonruter merged 10 commits intotrunkfrom update/od-readme

Jan 9, 2025

+317-278

Commits on Dec 23, 2024

Merge branch 'trunk' of https://github.com/WordPress/performance into update/od-readme
westonruter
committed

Commits on Jan 9, 2025

Move README.md to docs/introduction.md without mirrored content
westonruter
committed