Refactor functionality into smaller packages for use in frontend

[annardini]

It may be an idea to refactor some of the code in payload into smaller packages that contain key functionality such as Form Validation for React/Next JS, a system to create database schemas and ORMs in the same way Payload does, separate new Rich Text field into another package that can be used in the frontend to interact better with the API.

These are just a few ideas that could be useful when interacting with the Payload API from the frontend or when creating new projects that require the backend of Payload but doesn't require a frontend.