Add `features` arg to dev/build

Editor assessment

The subject states the feature precisely: a features argument is added to the dev and build commands, with a meaningful cli.rs scope. The flag, the commands it extends, and its cargo-features purpose are all evident, so no body is required. The feat type is right, no footers appear, and hygiene is clean, with the argument and commands named exactly. The message tells CLI users exactly which commands gained which capability, which fully satisfies the communication needs of a straightforward flag addition.