fix(clawhub): use 'clawhub' instead of 'claw-hub' as command name

src/main.rs

@@ -584,7 +584,7 @@ Examples:
     },
 
     /// Manage ClawHub skills
-    #[command(long_about = "\
+    #[command(name = "clawhub", long_about = "\
 Manage ClawHub skills.
 
 Discover, install, and manage skills from ClawHub (https://clawhub.ai).