Not installing Composer dev dependencies on local environment

When running `build-theme-assets` in composer, it runs `cd web/wp-content/themes/lean-theme && composer install --no-dev --no-ansi --no-interaction --optimize-autoloader --no-progress` to avoid installing dev dependencies on the pipelines build, however the idea would be to be able to run `composer install` to also install the Lean Theme's dev dependencies when developing on local environment.