[APP] LayerOne DocX

**Name of app / service**
LayerOne DocX — document & Factur-X (electronic invoice) generation from Word templates

**Link to developer documentation**
- OpenAPI spec: https://raw.githubusercontent.com/GOLayerone/layerone-api-specs/main/docx-openapi.yaml
- Developer portal: https://dev.layerone.fr/integrations.html

**Is lack of support preventing you from moving forward, or do you have a workaround?**
We are the API publisher (GO PROTECT / LayerOne). We have already built ready-to-use components following the registry conventions and would like the `docx` app registered so we can contribute them. Authentication is a simple API key sent in the `X-API-Key` header.

**Are there specific actions or triggers you'd like to see for this app?**
render-document, render-facturx, upload/update/list/download/delete templates, list/restore template versions, usage stats (11 actions)