feat: add quote item to PromptEngine (#338)

### What problem does this PR solve?

Show original text source in conversation messages

Issue link: #337

### Type of change

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

web/src/locales/en.ts

@@ -333,6 +333,8 @@ export default {
       maxTokensMessage: 'Max Tokens is required',
       maxTokensTip:
         'This sets the maximum length of the model’s output, measured in the number of tokens (words or pieces of words).',
+      quote: 'Show Quote',
+      quoteTip: 'Should the source of the original text be displayed?',
     },
     setting: {
       profile: 'Profile',