feat: refactor date handling in ads and news creation/update

app/utils/formatter.ts

@@ -11,6 +11,12 @@ export const formatDate = (isoDate: string): string => {
   }).format(date)
 }
 
+export const dateInput = (isoDate: string): string =>
+  new Date(isoDate).toISOString().split('T')[0]
+
+export const datePayload = (date: string): string =>
+  new Date(date).toISOString()
+
 export const urlFriendlyCode = (input: string) => {
   return input
     .trim()