Add Bilig WorkPaper MCP catalog entry

[gregkonush]

• A human has tested these changes.

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Why

OpenHands already supports Streamable HTTP MCP servers in settings, and the extensions repo is the catalog source consumed by @openhands/extensions.

Bilig WorkPaper gives agents a narrow spreadsheet-formula surface: write workbook inputs, recalculate formulas, verify readback, and export JSON-backed workbook state without driving Excel, Sheets, or browser UI.

Related context: OpenHands/OpenHands#11004 and OpenHands/OpenHands#14524.

Summary

• Add mcps/catalog/bilig-workpaper.json for the hosted Bilig WorkPaper Streamable HTTP MCP endpoint.
• Export the catalog entry from mcps/index.js.
• Include spreadsheet/workbook/formula/readback keywords so OpenHands users can find it from MCP search.

Issue Number

Related: OpenHands/OpenHands#11004, OpenHands/OpenHands#14524.

How to Test

python3 -m json.tool mcps/catalog/bilig-workpaper.json >/dev/null
node -e "import('./mcps/index.js').then(({MCP_CATALOG})=>{const e=MCP_CATALOG.find(x=>x.id==='bilig-workpaper'); if(!e) throw new Error('missing bilig-workpaper'); if(e.template.kind !== 'shttp') throw new Error('wrong kind'); console.log(e.template.url);})"
python scripts/sync_extensions.py --check
git diff --check
curl -sS -i https://bilig.proompteng.ai/mcp \
  -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{},"clientInfo":{"name":"openhands-catalog-check","version":"0.0.0"}}}'

The POST initialize check returned HTTP 200 with MCP server info for bilig-workpaper-remote-demo.

Video/Screenshots

Not included. This is a catalog metadata change.

Notes

I searched this repo and the OpenHands repos for Bilig, WorkPaper, and proompteng before opening this. I did not find an existing Bilig catalog entry, issue, or PR.