feat(frontend): add API client, layout, and routing

- Create Axios-based API client with sources, jobs, and dashboard endpoints
- Add responsive Layout component with navigation sidebar
- Set up React Router with Dashboard, Backups, and Settings routes
- Configure TanStack Query provider with default options
- Use lucide-react for navigation icons

frontend/node_modules/parse5/README.md

@@ -0,0 +1,38 @@
+<p align="center">
+    <a href="https://github.com/inikulin/parse5">
+        <img src="https://raw.github.com/inikulin/parse5/master/media/logo.png" alt="parse5" />
+    </a>
+</p>
+
+<div align="center">
+<h1>parse5</h1>
+<i><b>HTML parser and serializer.</b></i>
+</div>
+<br>
+
+<div align="center">
+<code>npm install --save parse5</code>
+</div>
+<br>
+
+<p align="center">
+  📖 <a href="https://parse5.js.org/modules/parse5.html"><b>Documentation</b></a> 📖
+</p>
+
+---
+
+<p align="center">
+  <a href="https://github.com/inikulin/parse5/tree/master/docs/list-of-packages.md">List of parse5 toolset packages</a>
+</p>
+
+<p align="center">
+    <a href="https://github.com/inikulin/parse5">GitHub</a>
+</p>
+
+<p align="center">
+  <a href="http://astexplorer.net/#/1CHlCXc4n4">Online playground</a>
+</p>
+
+<p align="center">
+    <a href="https://github.com/inikulin/parse5/releases">Changelog</a>
+</p>