## What kind of change does this PR introduce?
Chore. Stops committing generated design-system registry output
([DEPR-647](https://linear.app/supabase/issue/DEPR-647/generate-and-ignore-design-system-registry-output)).
## What is the current behavior?
`apps/design-system/__registry__` is build output from `registry/`, but
the chart snapshots and index are committed. That makes reviews noisy,
and a forgotten `build:registry` leaves `master` out of date until
someone else regenerates it.
## What is the new behavior?
`pnpm dev` and `pnpm typecheck` generate `__registry__` automatically.
The directory is gitignored, and the previously tracked snapshots are
removed. `pnpm build` still generates it as before.
## To test
- From the repo root, run `pnpm --filter=design-system
generate:registry` and confirm
`apps/design-system/__registry__/index.tsx` is created locally and is
untracked.
- Run `pnpm dev:design-system`, open
[http://localhost:3003](http://localhost:3003), and open any component
docs page with a live preview (for example Charts). Previews and source
panels should still load.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Documentation**
* Clarified when the component registry is generated and how to
regenerate it.
* Expanded component documentation guidance, including content sources
and generated-file editing restrictions.
* **Chores**
* Improved registry generation across development, type checking,
builds, and cleanup.
* Generated registry files are now excluded from version control and
linting.
* Improved reliability when creating and refreshing generated registry
files.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
* Move all components in ui-patterns into src folder. Add exports field for all files.
* Fix all apps to use the new ui-patterns.
* Fix the design-system build.
* Remove all unused rexports from ui-patterns index. Apps should use direct imports instead.
* Change the tailwind content property to include src folder of ui-patterns.
* Remove autoprefixer from the tailwind configs.
* Remove autoprefixer as a dependency.
* Fix the CVA conditions in FormLayout.
* Set overrides for vite/esbuild packages, they're not used in production, low risk of something breaking.
* Bump vitest.
* Remove lodash.template from design-system.
* Forgot to run pnpm.
