refactor: enhance error handling in user prompts

- Updated exception handling in multiple prompt functions to catch NotImplementedError alongside ImportError, improving robustness across the application.
- Ensured fallback mechanisms are clearly documented for better understanding of platform limitations.

hermes_cli/main.py

@@ -231,7 +231,7 @@ def _prompt_provider_choice(choices):
         idx = menu.show()
         print()
         return idx
-    except ImportError:
+    except (ImportError, NotImplementedError):
         pass
 
     # Fallback: numbered list