Support tooltips on DynamicCombos (#9717)

Tooltips are normally resolved through the node definition. Since
DynamicCombo added widgets are nested in the spec definition, this
lookup fails to find them. This PR makes it so that when a widget is
dynamically added using `litegraphService:addNodeInput`, any 'tooltiptip
defined in the provided inputSpec is applied on the widget.

The tooltip system does not current support tooltips for dynamiclly
added inputs. That can be considered for a followup PR.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9717-Support-tooltips-on-DynamicCombos-31f6d73d365081dc93f9eadd98572b3c)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/composables/graph/useGraphNodeManager.ts

@@ -324,7 +324,8 @@ function safeWidgetMapper(
             }
           : (extractWidgetDisplayOptions(effectiveWidget) ?? options),
         slotMetadata: slotInfo,
-        slotName: name !== widget.name ? widget.name : undefined
+        slotName: name !== widget.name ? widget.name : undefined,
+        tooltip: widget.tooltip
       }
     } catch (error) {
       return {