feat: add slot for extra header info to ADialog component

src/components/generic/ADialog.vue

@@ -13,6 +13,7 @@
           <p :class="titleClass">{{ title }}</p>
         </slot>
       </div>
+      <slot name="header-extra" />
       <button
         type="button"
         class="btn btn-default tw-w-8 tw-h-8 tw-ml-auto tw-p-0 tw-justify-center tw-rounded-full"