feat: Asset Browser Placeholder update (#8349)

## Summary

Remind Creators that they can add models that they don't have available
yet

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8349-feat-Asset-Browser-Placeholder-update-2f66d73d3650815f83b4e7ce3587740c)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>

src/platform/assets/components/AssetBrowserModal.vue

@@ -211,7 +211,11 @@ const shouldShowLeftPanel = computed(() => {
 })
 
 const emptyMessage = computed(() => {
-  if (!isImportedSelected.value) return undefined
+  if (!isImportedSelected.value) {
+    return isUploadButtonEnabled.value
+      ? t('assetBrowser.noResultsCanImport')
+      : undefined
+  }
 
   return isUploadButtonEnabled.value
     ? t('assetBrowser.emptyImported.canImport')

src/platform/assets/components/AssetGrid.vue

@@ -21,7 +21,7 @@
       <h3 class="mb-2 text-lg font-medium">
         {{ emptyTitle ?? $t('assetBrowser.noAssetsFound') }}
       </h3>
-      <p class="text-sm">
+      <p class="text-sm whitespace-pre-wrap text-center">
         {{ emptyMessage ?? $t('assetBrowser.tryAdjustingFilters') }}
       </p>
     </div>