Add PaperJSX skill

[jacobgfell]

Summary

Adds the PaperJSX skill to skills/.curated/. PaperJSX is a local MCP server (@paperjsx/mcp-server) that generates PPTX, DOCX, XLSX, and PDF documents from structured JSON input.

• Runs locally — no API key, no network calls; wraps free-tier @paperjsx/json-to-* npm packages
• License: Apache-2.0
• npm: https://www.npmjs.com/package/@paperjsx/mcp-server (v0.2.0)
• Skill source: https://github.com/paperjsx/agent-skill

Files added

```
skills/.curated/paperjsx/
├── SKILL.md
├── LICENSE.txt
├── agents/
│ └── openai.yaml
└── references/
└── json-schema.md
```

What it does

PaperJSX exposes document-generation tools (`generate_presentation`, `generate_docx`, `generate_spreadsheet`, `generate_invoice`, `generate_report`, `generate_chart_document`, plus template/listing tools). Given a JSON spec, it produces a valid .pptx / .docx / .xlsx / .pdf artifact on disk.

Testing

• `@paperjsx/mcp-server@0.2.0` is published on npm and smoke-tested via stdio with a real agent client
• All 68 package tests pass (including a banned-token scan asserting no upsell / compliance language in tool output)
• SKILL.md and `agents/openai.yaml` conform to the structure used by existing `.curated` skills (e.g. `doc/`, `linear/`)

Happy to adjust the skill metadata or file layout to match catalog conventions.