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/he-IL.json

@@ -0,0 +1,10 @@
+{
+  "dateTime": "%A, %e ב%B %Y %X",
+  "date": "%d.%m.%Y",
+  "time": "%H:%M:%S",
+  "periods": ["AM", "PM"],
+  "days": ["ראשון", "שני", "שלישי", "רביעי", "חמישי", "שישי", "שבת"],
+  "shortDays": ["א׳", "ב׳", "ג׳", "ד׳", "ה׳", "ו׳", "ש׳"],
+  "months": ["ינואר", "פברואר", "מרץ", "אפריל", "מאי", "יוני", "יולי", "אוגוסט", "ספטמבר", "אוקטובר", "נובמבר", "דצמבר"],
+  "shortMonths": ["ינו׳", "פבר׳", "מרץ", "אפר׳", "מאי", "יוני", "יולי", "אוג׳", "ספט׳", "אוק׳", "נוב׳", "דצמ׳"]
+}