feat: add admin-web application with React and Vite

feat(admin-web): implement basic layout and navigation
feat(admin-web): implement dashboard page with key metrics
feat(admin-web): implement user management page
feat(admin-web): implement analytics page with user stats
feat(admin-web): implement logs explorer page
style(admin-web): add tailwind css and shadcn/ui components
build(admin-web): configure eslint and prettier for code quality

This commit introduces the admin-web application, a React-based
administration console built with Vite.

- The application provides a central interface for managing
 users, monitoring platform health, and troubleshooting issues.
- It includes a basic layout with navigation, a dashboard
 displaying key metrics, a user management page, an analytics
 page with user statistics, and a logs explorer page.
- Tailwind CSS and shadcn/ui components are used for styling.
- ESLint and Prettier are configured to ensure code quality.

admin-web/src/lib/utils.js

@@ -0,0 +1,6 @@
+import { clsx } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs) {
+  return twMerge(clsx(inputs))
+}