feat: support Self-RAG #1069 (#1079)

### What problem does this PR solve?

feat: support Self-RAG #1069
### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/chat/chat-configuration-modal/assistant-setting.tsx

@@ -90,6 +90,15 @@ const AssistantSetting = ({ show }: ISegmentedContentProps) => {
       >
         <Switch />
       </Form.Item>
+      <Form.Item
+        label={t('selfRag')}
+        valuePropName="checked"
+        name={['prompt_config', 'self_rag']}
+        tooltip={t('selfRagTip')}
+        initialValue={true}
+      >
+        <Switch />
+      </Form.Item>
       <KnowledgeBaseItem></KnowledgeBaseItem>
     </section>
   );