feat: new endpoint-style structure in client side

NOT FINISHED. model menu and icon and send message not work.

client/src/store/endpoints.js

@@ -0,0 +1,26 @@
+import { atom, selector } from 'recoil';
+
+const endpointsFilter = atom({
+  key: 'endpointsFilter',
+  default: {
+    azureOpenAI: false,
+    openAI: false,
+    bingAI: false,
+    chatGPTBrowser: false
+  }
+});
+
+const availableEndpoints = selector({
+  key: 'availableEndpoints',
+  get: ({ get }) => {
+    const endpoints = ['azureOpenAI', 'openAI', 'bingAI', 'chatGPTBrowser'];
+    const f = get(endpointsFilter);
+    return endpoints.filter(endpoint => f[endpoint]);
+  }
+});
+// const modelAvailable
+
+export default {
+  endpointsFilter,
+  availableEndpoints
+};