Improve Wikipedia error messages

Refined the exception details in the Wikipedia tool to include the search query when no results are found, enhancing the clarity of error outputs for end-users. This change helps in debugging by indicating the exact query that led to a no-results situation. Additionally, the existing failure-to-connect error message was left as-is, maintaining accurate API connectivity diagnostics.

src/gptbot/tools/wikipedia.py

@@ -57,6 +57,6 @@ class Wikipedia(BaseTool):
                     elif 'revisions' in page:
                         return f"**{page['title']}**\n{page['revisions'][0]['*']}"
                     else:
-                        raise Exception('No results found.')
+                        raise Exception(f'No results for {query} found in Wikipedia.')
                 else:
                     raise Exception(f'Could not connect to Wikipedia API: {response.status} {response.reason}')