fix: create skills dir on onboard

nanobot/cli/commands.py

@@ -294,6 +294,10 @@ This file stores important information that should persist across sessions.
 """)
         console.print("  [dim]Created memory/MEMORY.md[/dim]")
 
+    # Create skills directory for custom user skills
+    skills_dir = workspace / "skills"
+    skills_dir.mkdir(exist_ok=True)
+
 
 def _make_provider(config):
     """Create LiteLLMProvider from config. Exits if no API key found."""