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/tailwindcss/scripts/create-plugin-list.js

@@ -0,0 +1,10 @@
+import { corePlugins } from '../src/corePlugins'
+import fs from 'fs'
+import path from 'path'
+
+let corePluginList = Object.keys(corePlugins)
+
+fs.writeFileSync(
+  path.join(process.cwd(), 'src', 'corePluginList.js'),
+  `export default ${JSON.stringify(corePluginList)}`
+)