feat: add useIsToday helper function

src/util.ts

-import { computedAsync } from '@vueuse/core'
+import { computedAsync, useNow } from '@vueuse/core'
 import { formatDistanceToNow, formatISO, parseISO } from 'date-fns'
 import DateFnEnUsLocale from 'date-fns/locale/en-US'
 import DOMPurify from 'dompurify'
@@ -302,3 +302,21 @@ export function usePersonName(user: MaybeRefOrGetter<SteeringUser>) {
     }
   })
 }
+
+export function useIsToday(
+  date: MaybeRefOrGetter<Date | string>,
+  today?: MaybeRefOrGetter<Date | string>,
+) {
+  const datetime = computed(() => ensureDate(toValue(date)))
+  const now =
+    typeof today === 'undefined'
+      ? useNow({ interval: 60 * 1000 })
+      : computed(() => ensureDate(toValue(today)))
+  return computed(() => {
+    return (
+      now.value.getDate() === datetime.value.getDate() &&
+      now.value.getMonth() === datetime.value.getMonth() &&
+      now.value.getFullYear() === datetime.value.getFullYear()
+    )
+  })
+}