Add Bilig WorkPaper MCP cookbook

[gregkonush]

Summary

• Add a Bilig WorkPaper MCP cookbook for Continue Agent mode.
• Show a streamable-http MCP config that points at the public Bilig sample endpoint.
• Add a copy-paste Bilig evaluator command so users can verify the same MCP tool surface before wiring it into Continue.
• Add practical prompts for editing a workbook input, recalculating formulas, and returning verified JSON readback.
• Link the cookbook from the guides overview MCP cookbook grid.

Validation

• npm exec --yes --package @bilig/workpaper@latest -- bilig-evaluate --door agent-mcp --json returned verified: true on @bilig/workpaper@0.131.1; it listed 8 MCP tools, edited Inputs!B3, recalculated ARR from 60000 to 96000, persisted WorkPaper JSON, and verified restart readback at 96000.
• curl -X POST https://bilig.proompteng.ai/api/workpaper/n8n/forecast ... returned verified: true after setting Inputs!B3 to 0.5.
• git diff --check
• npx --yes prettier@3.3.3 --check docs/guides/bilig-workpaper-mcp-cookbook.mdx docs/guides/overview.mdx
• mise exec node@20.20.1 -- npm ci

Build note

mise exec node@20.20.1 -- npm run build currently fails before reaching this MDX change because Mintlify imports a default export from tar, while the installed tar package does not provide one:

SyntaxError: The requested module 'tar' does not provide an export named 'default'

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[cubic-dev-ai]

No issues found across 2 files

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[gregkonush]

I have read the CLA Document and I hereby sign the CLA

[gregkonush]

recheck