Add @witqq/spreadsheet to Table section

Author: witqq

README.md

@@ -957,6 +957,7 @@ _Tables / data grids_
 - [hy-vue-gantt](https://github.com/Xeyos88/HyVueGantt) - A powerful and flexible Gantt chart component for Vue 3 applications.
 - [Vue3 Pivottable](https://github.com/vue-pivottable/vue3-pivottable) – A Vue 3 port of the jQuery-based PivotTable.js.
 - [GridSheet](https://github.com/walkframe/gridsheet) - Highly customizable spreadsheet engine with formula support, multi-sheet references, and a Vue3 wrapper built on a Preact core.
+- [@witqq/spreadsheet](https://github.com/witqq/spreadsheet) - A canvas-based spreadsheet engine with zero dependencies, rendering 100K+ rows at 60fps with sorting, filtering, formulas, and collaboration.
 
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