chore: remove Next.js dependencies and update UI components with standard React

src/components/ui/CountUpNumber.tsx

@@ -0,0 +1,18 @@
+'use client'
+
+import CountUp from 'react-countup'
+import { SectionHeader } from '@/components/Texts'
+
+interface CountUpNumberProps {
+  end: number
+  className?: string
+  color?: 'light' | 'primary' | 'secondary'
+}
+
+export function CountUpNumber({ end, className, color }: CountUpNumberProps) {
+  return (
+    <SectionHeader color={color} className={className}>
+      <CountUp end={end} duration={2.75} separator="," />
+    </SectionHeader>
+  )
+}