booksniff, and one place for the parts every tool shares

crates/pdftriage/Cargo.toml

@@ -8,6 +8,7 @@ license.workspace = true
 repository.workspace = true
 
 [dependencies]
+catena-cli.workspace = true
 clap.workspace = true
 corpus-core.workspace = true
 regex.workspace = true

crates/pdftriage/src/main.rs

@@ -49,7 +49,10 @@ struct Args {
 }
 
 fn main() -> ExitCode {
-    let args = Args::parse();
+    let args: Args = match catena_cli::parse() {
+        Ok(args) => args,
+        Err(code) => return code,
+    };
 
     let bytes = match std::fs::metadata(&args.path) {
         Ok(meta) => meta.len() as i64,