feat(gui-v2): add icon for percent cell

packages/nc-gui-v2/components/smartsheet-header/CellIcon.vue

@@ -18,6 +18,7 @@ import AttachmentIcon from '~icons/mdi/image-multiple-outline'
 import URLIcon from '~icons/mdi/link'
 import EmailIcon from '~icons/mdi/email'
 import CurrencyIcon from '~icons/mdi/currency-usd-circle-outline'
+import PercentIcon from '~icons/mdi/percent-outline'
 
 const column = inject(ColumnInj)
 
@@ -54,6 +55,8 @@ const icon = computed(() => {
     return URLIcon
   } else if (additionalColMeta.isCurrency) {
     return CurrencyIcon
+  } else if (additionalColMeta.isPercent) {
+    return PercentIcon
   } else if (additionalColMeta.isString) {
     return h(StringIcon, {
       class: 'text-[1.5rem]',