feat: Allow using file variables directly in the LLM node and support more file types. (#10679)

Co-authored-by: Joel <iamjoel007@gmail.com>

web/app/components/workflow/nodes/llm/components/config-prompt-item.tsx

@@ -144,6 +144,7 @@ const ConfigPromptItem: FC<Props> = ({
       onEditionTypeChange={onEditionTypeChange}
       varList={varList}
       handleAddVariable={handleAddVariable}
+      isSupportFileVar
     />
   )
 }