Supabase Local Dev: migrations, branching, and observability

- Supabase is focusing on improving the local development experience for Postgres development.
- The Postgres Language Server is being developed to provide better support for Postgres in code editors, including features like linting, syntax highlighting, Migrations Parsing, SQL auto-complete, and intellisense.
- The Postgres Language Server is not ready for production but is receiving positive feedback and support.
- Easier backups and database migration tools have been added to make it easier to backup and migrate databases.
- Dashboard support has been added for migrations, allowing users to track migration history.
- Database testing has been simplified with new features added for testing and linting databases.
- Plpgsql_check extension is supported for linting and foreign keys are included in generated types.