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/d3-time-format/locale/ar-SY.json

@@ -0,0 +1,10 @@
+{
+  "dateTime": "%x, %X",
+  "date": "%-d/%-m/%Y",
+  "time": "%-I:%M:%S %p",
+  "periods": ["ص", "م"],
+  "days": ["الأحد", "الإثنين", "الثلاثاء", "الأربعاء", "الخميس", "الجمعة", "السبت"],
+  "shortDays": ["أحد", "إثنين", "ثلاثاء", "أربعاء", "خميس", "جمعة", "سبت"],
+  "months": ["كانون الثاني", "شباط", "آذار", "نيسان", "أيار", "حزيران", "تموز", "آب", "أيلول", "تشرين الأول", "تشرين الثاني", "كانون الأول"],
+  "shortMonths": ["ك٢", "شباط", "آذار", "نيسان", "أيار", "حزيران", "تموز", "آب", "أيلول", "ت١", "ت٢", "ك١"]
+}