Add new attribute package_registry_access_level to the projects API code. ## Implementation Guide - Follow the `CONTRIBUTING.md` guide for setting up your local development environment. - Clone the community fork of this project. - In `projects.go`, add a new attribute called `PackageRegistryAccessLevel` to the structs `Project`, `CreateProjectOptions` and `EditProjectOptions`. Look at attribute `ContainerRegistryAccessLevel` to see what this looks like in each struct. - Add a deprecation notice to the `PackagesEnabled` attribute in all three structs. - Update the tests to use the new attribute.