* Fix some missing and duplicate dependencies.
* Fix the types for jest in ai-commands package.
* Replace all npm commands with pnpm. Add pnpm files and workspace links.
* Fix rimraf to work with pnpm.
* Refactor the github actions to work with pnpm.
* Delete package-lock.json.
* Fix the tailwind configs to not include node_modules.
* Fix random files.
* Add preinstall scripts to all packages.
* Fix the Dockerfile to work with pnpm.
* Update the DEVELOPERS documentation.
Add the ability to embed code samples from GitHub into tutorials, so we can have a single source of truth for the source code.
Introduces the <$CodeSample /> syntax, which is a special syntax and not a real React component (see the directives/README.md for why on earth I did it this way -- in this specific case, CodeHike adjusts the MDX syntax tree before it gets compiled, and we need to adjust it ourselves before CodeHike sees it, so we need to get down to the level of manipulating the AST in order to make this work with CodeHike).
Adjusted one of the example tutorials to use this new feature as a test.
Stephen Morgan