feat: create date formatting util

#19

Author: timepresent95

src/utils/date.ts

@@ -0,0 +1,7 @@
+export function formatDate(date: Date): string {
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, '0');
+  const day = String(date.getDate()).padStart(2, '0');
+
+  return `${year}-${month}-${day}`;
+}