Add duration unit format (#2483)

* chore: 🤖 add @formatjs/intl-durationformat to addons/core

* refactor: 💡 replace old duration format with new package

* chore: 🤖 remove intl-unofficial-duration-unit-format

* Add missing copyright headers

* test: 💍 add more test cases

---------

Co-authored-by: cameronperera <cameronperera@users.noreply.github.com>

addons/core/addon/utils/seconds-to-duration.js

@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: BUSL-1.1
+ */
+
+/**
+ * Takes in the number of seconds and converts to an object with corresponding
+ * values for each time duration. For example:
+ * { weeks: 0, days: 0, hours: 22, minutes: 15, seconds: 11 }
+ * @param {number} value
+ * @returns {object}
+ */
+export const secondsToDuration = (value) => {
+  const second = 1;
+  const minute = second * 60;
+  const hour = minute * 60;
+  const day = hour * 24;
+  const week = day * 7;
+
+  const weeks = Math.max(Math.floor(value / week), 0);
+  const days = Math.max(Math.floor((value % week) / day), 0);
+  const hours = Math.max(Math.floor((value % day) / hour), 0);
+  const minutes = Math.max(Math.floor((value % hour) / minute), 0);
+  const seconds = Math.max(Math.floor((value % minute) / second), 0);
+
+  return { weeks, days, hours, minutes, seconds };
+};