style: use "text-button-icon" token for dropdown icons on Vue nodes (#6284)

## Summary

Change these dropdown icons to match [the
design](https://www.figma.com/design/31uH3r4x3xbIctuRWYW6NM/V3---Vue-Nodes?node-id=6189-6820&m=dev).

**Before**

<img width="692" height="694" alt="Selection_2196"
src="https://github.com/user-attachments/assets/aa1fb135-0ad0-4ab6-8c79-7163349b5fae"
/>

**After**

<img width="600" height="602" alt="Selection_2195"
src="https://github.com/user-attachments/assets/742ddef4-4b51-48ba-98a0-9517267de0e1"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6284-style-use-text-button-icon-token-for-dropdown-icons-on-Vue-nodes-2976d73d365081d29d2aee51e836caaf)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/components/graph/widgets/MultiSelectWidget.vue

@@ -8,6 +8,9 @@
       :max-selected-labels="3"
       :display="display"
       class="w-full"
+      :pt="{
+        dropdownIcon: 'text-button-icon'
+      }"
     />
   </div>
 </template>

src/renderer/extensions/vueNodes/widgets/components/WidgetFileUpload.vue

@@ -25,7 +25,8 @@
           class="max-w-[20em] min-w-[8em] text-xs"
           size="small"
           :pt="{
-            option: 'text-xs'
+            option: 'text-xs',
+            dropdownIcon: 'text-button-icon'
           }"
         />
         <Button
@@ -95,7 +96,8 @@
           class="max-w-[20em] min-w-[8em] text-xs"
           size="small"
           :pt="{
-            option: 'text-xs'
+            option: 'text-xs',
+            dropdownIcon: 'text-button-icon'
           }"
         />
         <Button

src/renderer/extensions/vueNodes/widgets/components/WidgetInputNumberInput.vue

@@ -103,10 +103,10 @@ const inputNumberPt = useNumberWidgetButtonPt({
         @update:model-value="onChange"
       >
         <template #incrementicon>
-          <span class="pi pi-plus text-sm" />
+          <span class="pi pi-plus text-sm text-button-icon" />
         </template>
         <template #decrementicon>
-          <span class="pi pi-minus text-sm" />
+          <span class="pi pi-minus text-sm text-button-icon" />
         </template>
       </InputNumber>
     </div>

src/renderer/extensions/vueNodes/widgets/components/WidgetMultiSelect.vue

@@ -9,7 +9,8 @@
       size="small"
       display="chip"
       :pt="{
-        option: 'text-xs'
+        option: 'text-xs',
+        dropdownIcon: 'text-button-icon'
       }"
       @update:model-value="onChange"
     />

src/renderer/extensions/vueNodes/widgets/components/WidgetSelectDefault.vue

@@ -8,7 +8,8 @@
       :aria-label="widget.name"
       size="small"
       :pt="{
-        option: 'text-xs'
+        option: 'text-xs',
+        dropdownIcon: 'text-button-icon'
       }"
       data-capture-wheel="true"
       @update:model-value="onChange"

src/renderer/extensions/vueNodes/widgets/components/WidgetTreeSelect.vue

@@ -6,6 +6,9 @@
       class="w-full text-xs"
       :aria-label="widget.name"
       size="small"
+      :pt="{
+        dropdownIcon: 'text-button-icon'
+      }"
       @update:model-value="onChange"
     />
   </WidgetLayoutField>