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/fastq/eslint.config.js

@@ -0,0 +1,11 @@
+const neostandard = require('neostandard')
+
+module.exports = [
+  ...neostandard(),
+  {
+    name: 'node-0.10-compatibility',
+    rules: {
+      'object-shorthand': 'off' // Disable ES6 object shorthand for Node.js 0.10 compatibility
+    }
+  }
+]