Add Fabric Apps React Webapp Starter to the catalog

src/content/tools/fabric-apps-react-starter.md

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+---
+title: Fabric Apps React Webapp Starter
+description: React starter template for building Microsoft Fabric Apps that embed in the Fabric portal and read a Power BI semantic model's metadata via DAX.
+url: https://github.com/Big-jpg/fabric-apps-react-webapp-starter
+docs_url: https://github.com/Big-jpg/fabric-apps-react-webapp-starter/blob/main/Architecture.md
+category: ide-extensibility
+type: template
+tags: [react, fabric-apps, rayfin, extensibility]
+pricing: free
+source: open-source
+maintainer: community
+author: Ross Farrell
+language: TypeScript
+status: preview
+added: 2026-06-10
+---
+
+## What it does
+
+Fabric Apps React Webapp Starter is a configurable React starter template for building Microsoft Fabric Apps, single-page apps that embed in the Fabric portal as an iframe. It connects to a configured Power BI semantic model through the Fabric embedded query bridge and renders live metadata via DAX, shipping with a small example that lists the model's tables (total, visible, hidden, and category counts). It is built on React 19, TypeScript, Tailwind CSS, and Microsoft's rayfin-client and fabric-app-data libraries.
+
+## Why use it
+
+Use it as a scaffold to start building your own Fabric App, with semantic-model connectivity, configuration, and a working DAX query example already wired up, instead of setting up the embedding and query bridge from scratch.
+
+## Getting started
+
+Use the repository as a GitHub template (or clone it), set your semantic model alias in `app.integration.json`, and run the React app. See `Architecture.md` for how the pieces fit together. Note that Fabric Apps and the `rayfin-client` library are early/preview Microsoft technology.