Feat: Add NextLLMSelect with shadcn-ui. #3221 (#5542)

### What problem does this PR solve?
Feat: Add NextLLMSelect with shadcn-ui. #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/form/generate-form/index.tsx

@@ -1,4 +1,4 @@
-import LLMSelect from '@/components/llm-select';
+import { NextLLMSelect } from '@/components/llm-select';
 import { MessageHistoryWindowSizeFormField } from '@/components/message-history-window-size-item';
 import { PromptEditor } from '@/components/prompt-editor';
 import {
@@ -33,7 +33,7 @@ const GenerateForm = ({ form }: INextOperatorForm) => {
                 {t('chat.model')}
               </FormLabel>
               <FormControl>
-                <LLMSelect {...field} />
+                <NextLLMSelect {...field} />
               </FormControl>
               <FormMessage />
             </FormItem>