Added RevoGrid library to Spreadsheets

[revolist]

Checklist:

• [x] I've read and understood Contributing Guidelines.
• [x] I've added the new resource at the end of its section.
• [x] This resource is out there for a while, and actively maintained.
• [x] This resource is popular enough and has at least a few hundred stars on GitHub.

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Adding RevoGrid to the Spreadsheet category of the “Awesome JavaScript” list. RevoGrid is designed to address the needs of developers who require a fast, flexible, and feature-rich grid component capable of handling large datasets with ease. I believe RevoGrid would be a great addition to your list.

[Ashe-reset]

这是来自QQ邮箱的假期自动回复邮件。   您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。

[gokaygurcan]

I liked your pricing model. Limited support and priority on features are nice ways of monetising the product and service around it. Cheers!