Throw and error when the index is not found

Co-authored-by: Louis Dureuil <louis@meilisearch.com>

crates/meilitool/src/main.rs

@@ -443,7 +443,8 @@ fn compact_index(db_path: PathBuf, index_name: &str) -> anyhow::Result<()> {
         drop(new_file);
 
         println!("Everything's done 🎉");
+        return Ok(())
     }
 
-    Ok(())
+    bail!("Target index {index_name} not found!")
 }