Adds comprehensive explanation that both files support executors and all Nx features through the 'nx' property in package.json. Clarifies that project.json is optional. Preview: https://nx-dev-git-issues-28715-nrwl.vercel.app/reference/project-configuration#project-level-configuration-files ## Current Behavior The documentation for project configuration does not clearly explain that both package.json and project.json support the same Nx features, including executors. ## Expected Behavior The documentation now clearly states that: - Both package.json and project.json support targets through the "nx" property in package.json - The choice between the two is primarily a matter of preference - Includes an updated example showing how to use `nx.targets` in package.json ## Related Issue(s) Fixes #28715