Display the type icon in the add button

I've made something that's not useable for the community; the patch is simply applicable for our own specific situation, however I still wanted to share. I've added a screenshot aswell.

It's a little patch and some custom CSS for Gin which we load in through a different module.

The custom CSS is super basic and looks like this:

#edit-field-paragraphs-add-more:has(> .field-add-more-submit.add-mode-button) {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
}

#edit-field-paragraphs-add-more > .field-add-more-submit.add-mode-button {
  height: 4rem;
  font-size: 14px;
  padding-left: 4.4rem;
  text-align: start;
  background-size: 4rem;
  background-position: left;
  background-repeat: no-repeat;
}

#edit-field-paragraphs-add-more > .field-add-more-submit.add-mode-button:hover {
  color: var(--gin-color-primary);
  background-color: var(--gin-bg-header);
}