feat(api): add stats chart endpoint for admin access with time series data

feat(dayjs): integrate dayjs for date handling and formatting across the application
refactor(routes): update date handling in id-tags, transactions, users, and dashboard routes to use dayjs
style(globals): improve CSS variable definitions for better readability and consistency
deps: add dayjs as a dependency for date manipulation

apps/web/package.json

@@ -13,8 +13,10 @@
     "@heroui/styles": "3.0.0-beta.8",
     "@internationalized/date": "^3.12.0",
     "@tanstack/react-query": "catalog:",
+    "@tremor/react": "4.0.0-beta-tremor-v4.4",
     "@types/qrcode": "^1.5.6",
     "better-auth": "catalog:",
+    "dayjs": "catalog:",
     "next": "16.1.6",
     "qrcode.react": "^4.2.0",
     "react": "19.2.3",