Add the man-and-completions example, which writes photocraft-cli's
completions for bash, zsh, fish, elvish and PowerShell (clap_complete)
and its man pages (clap_mangen: photocraft-cli.1 and one per
subcommand, such as photocraft-cli-convert.1) into a directory:
cargo run -p photocraft-cli --example man-and-completions -- <out-dir>
clap_complete and clap_mangen are dev-dependencies, so the binary is
unchanged. clap_mangen gets its env feature, so the pages name each
flag's environment variable as --help does; clap already has env, so
Cargo.lock gains no package for it. The library exposes only
`command()`, the clap definition; the args module stays private.
A test runs Command::debug_assert and checks that every shell's
completions and every page generate. Another repeats the example's two
generate_to calls and pins the exact file list: the five completion
files under the names the packages install, photocraft-cli.1, one page
per subcommand, and no pages for the help subcommand.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
