fix: report what happened instead of losing it

src/cli/link.rs

@@ -20,6 +20,10 @@ pub enum Link {
 
     /// Move paths in the store back into the repository
     Restore {
+        // said here rather than checked at runtime, so a mistake in the
+        // arguments is reported as one, with the usage and the exit code clap
+        // gives every other argument error
+        #[arg(required_unless_present = "all", conflicts_with = "all")]
         paths: Vec<PathBuf>,
 
         /// Restore every path this repository has in the store