Tool: improve calculator

[lusmoura]

• Fix calculator citations not working by renaming the output field to text instead of result
• Improve calculator description for better input generations
• Strip comments and new lines from generated expression to avoid parsing issues

AI Description

The pull request makes changes to the calculator tool's functionality and description.

Summary

The calculator tool has been enhanced to offer a wider range of mathematical and conversion capabilities. The tool's description has been updated to reflect its expanded capabilities, including a large library of customizable functions, unit and currency conversions, and symbolic calculations.

Changes

• The code parameter's description has been updated to specify that it should be a "valid mathematical expression" for the calculator to evaluate.
• The is_available method has been updated to reflect the new capabilities of the calculator tool.
• The description of the calculator tool has been expanded to highlight its multi-purpose nature, including features like unit calculations, currency conversion, and symbolic calculations.
• The call method has been modified to improve expression handling:
  • The parameters dictionary now uses the key "expression" instead of "code".
  • Empty lines and lines starting with # are removed from the expression before evaluation.
  • The exception handling has been updated to include the specific error message, providing more detailed feedback to the user.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (main@3af28b2). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
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  Coverage        ?   87.91%           
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  Files           ?      114           
  Lines           ?     3666           
  Branches        ?        0           
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  Hits            ?     3223           
  Misses          ?      443           
  Partials        ?        0           

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[tianjing-li]

Approved !