add warning to fix bond/create

[sjplimp]

Summary

Add a warning to fix bond/create if used multiple times or in conjunction with fix bond/break. B/c the stored state on bond counts will possibly not be current in fix bond/create.

Related Issues

N/A

Author(s)

Steve

Licensing

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Backward Compatibility

N/A

Implementation Notes

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Post Submission Checklist

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• The feature or features in this pull request is complete
• Licensing information is complete
• Corresponding author information is complete
• The source code follows the LAMMPS formatting guidelines
• Suitable new documentation files and/or updates to the existing docs are included
• The added/updated documentation is integrated and tested with the documentation build system
• The feature has been verified to work with the conventional build system
• The feature has been verified to work with the CMake based build system
• A package specific README file has been included or updated
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