consider adding bilig headless spreadsheet engine

[gregkonush]

small listing suggestion, maybe out of scope if this list wants visual grid components only.

project: bilig / @bilig/headless
repo: https://github.com/proompteng/bilig
npm: https://www.npmjs.com/package/@bilig/headless

@bilig/headless is a MIT typescript spreadsheet/workbook engine for node services and agents. it is headless, so the main use case is formula evaluation and workbook automation rather than rendering a grid.

rough metadata:

• typescript
• headless spreadsheet engine
• formulas
• row/column structural edits
• range reads
• json persistence
• node/agent automation

no worries if this is too backend/engine-layer for the list.