feat(chatgpt-browser): add support for multiple GPT models

This commit adds support for multiple GPT models in the chatGPT-browser
client. The available models are now stored in a Map object, which maps
the model label to its corresponding model.

The commit adds a new component, ChatGPTOptions, to the client
UI to allow the user to select the GPT model to use in the chat. The
component is only displayed when the chatGPT-browser endpoint is
selected.

client/src/utils/buildPresetByConversation.js

@@ -30,7 +30,7 @@ const buildPresetByConversation = ({ title, conversation, ...others }) => {
   } else if (endpoint === 'chatGPTBrowser') {
     preset = {
       endpoint,
-      model: conversation?.model || 'text-davinci-002-render-sha',
+      model: conversation?.model || 'Default (GPT-3.5)',
       title,
       ...others
     };