Multiple Drupal.t() in notifications.js can be rewritten single Drupal.formatPlural() and be removed span

Problem/Motivation

In case of notifications remaining, revisedSentance text value on the itemsStatusChanged() differs by notification count.
The current implement use several Drupal.t() and if-else clause, finally concatenate these text but this section can write at once with Drupal.formatPlural().

Proposed resolution

Before:

          revisedSentance = `${Drupal.t(
            'You have ',
          )}<span class="bg-white px-1 text-black fw-bold rounded-1 fst-italic">${
            remainingCount
          }</span>`;
          if (remainingCount === 1) {
            revisedSentance += Drupal.t(' unread notification');
          } else {
            revisedSentance += Drupal.t(' unread notifications');
          }

After:

          revisedSentance =
           Drupal.formatPlural(
             remainingCount,
             'You have <span class="bg-white px-1 text-black fw-bold rounded-1 fst-italic">1</span> unread notification',
             'You have <span class="bg-white px-1 text-black fw-bold rounded-1 fst-italic">@count</span> unread notifications',
           );

Remaining tasks

User interface changes

API changes

Data model changes