Feature Request: Support for Sparklines

[itlubber]

Hello,

First of all, thank you for your fantastic work on openpyxl. It's an incredibly useful library and has made working with Excel files in Python much easier and more efficient.

I would like to request the addition of Sparklines support in a future version of openpyxl. Sparklines are a great feature in Excel for visualizing data trends directly within cells, and having this functionality available in openpyxl would be extremely beneficial for many use cases, especially for creating dynamic and visually informative reports.

If this feature could be considered for a future release, it would greatly enhance the library's capabilities and usefulness.

Thank you for considering this request, and I look forward to seeing what new features and improvements you have planned for openpyxl.

Best regards,