.env files

This release fixes several issues related to .env file parsing and manipulation, including BOM handling, backslash escaping, and error reporting for `dotenv run`. It also improves performance by caching empty file results.

This beta release introduces new features like setup mode prompting during nx init and source map annotations for show targets. It also includes numerous bug fixes across core, angular, js, linter, and testing modules, alongside an update to the axios dependency.