- Cleans up logging. Logs are now color-coded, added more debug logs, and errors can include some simple metadata (like provider id) to know which provider caused an issue.
- All errors are exposed via `@auth/core/errors`. Each error has a URL like: https://errors.authjs.dev#errorcode in the terminal, which points to the documentation explaining the problem in detail, suggesting a fix.
- Added a bunch of documentation that autogenerates the pages under https://authjs.dev/reference/core/modules/main
- Renames `AuthHandler` to `Auth` and `AuthOptions` to `AuthConfig`
- Throwing an error in `signIn` callback will now be caught as a general error and will redirect to `/error?error=Configuration`. If the callback returns `false`, it will redirect to `/error?error=AccessDenied`.
* chore(deps): add next and react to dev dependencies
* chore: move build configs to avoid crash with next dev
* chore: add next js dev app
* chore: remove .txt extension from LICENSE file
* chore: update CONTRIBUTING.md
* chore: watch css under development
* style(lint): run linter on index.css
* chore: fix some imports for dev server
* refactor: simplify client code
* chore: mention VSCode extension for linting
* docs: reword CONTRIBUTING.md
* chore: ignore linting pages and components
