WIP: doc: show license in CLI help

Resolves #26.

src/bin/cpsc/cli.rs

@@ -12,13 +12,13 @@
 // You should have received a copy of the GNU General Public License along with Capisco.  If not,
 // see <https://www.gnu.org/licenses/>.
 use crate::runner::{git::RepoSource, RepoName};
-use clap::Parser;
+use clap::{crate_license, Parser};
 use std::{ffi::OsString, path::PathBuf, process::Command, str::FromStr};
 use strum::EnumIter;
 use thiserror::Error as ThisError;
 
 #[derive(Debug, Parser)]
-#[clap(about, author, version)]
+#[clap(about, author, license = crate_license!(), version)]
 pub(crate) enum Cli {
     /// Use a starter file to quickly import or export a configuration.
     ///