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/reusify/benchmarks/fib.js

@@ -0,0 +1,13 @@
+'use strict'
+
+function fib (num) {
+  var fib = []
+
+  fib[0] = 0
+  fib[1] = 1
+  for (var i = 2; i <= num; i++) {
+    fib[i] = fib[i - 2] + fib[i - 1]
+  }
+}
+
+module.exports = fib