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/set-function-name/.eslintrc

@@ -0,0 +1,21 @@
+{
+	"root": true,
+
+	"extends": "@ljharb",
+
+	"rules": {
+		"id-length": "off",
+		"no-extra-parens": "off",
+	},
+
+	"overrides": [
+		{
+			"files": ["test/**/*.js"],
+			"rules": {
+				"id-length": "off",
+				"multiline-comment-style": "off",
+				"no-empty-function": "off",
+			},
+		},
+	],
+}