Turbopack updates: Moving homes

What this post added

This post announces the migration of the Turbopack bundler codebase from the `vercel/turbo` repository into the `vercel/next.js` monorepo. This strategic move is intended to improve development velocity and iteration speed by co-locating Turbopack with its primary user, Next.js. The post details the current progress of Turbopack, including its passing of the Next.js development test suite and compatibility with npm packages. It also outlines the technical rationale for the move, such as simplifying dependency management and cross-repository coordination, and discusses the migration strategy using `git-subtree` and `git-filter-branch`. Future priorities for Turbopack development are also highlighted, focusing on bug resolution, memory optimization, persistent caching, and production build support.