feat: Create a conversation before uploading files in it #1880 (#2057)

### What problem does this PR solve?

feat: Create a conversation before uploading files in it #1880

### Type of change


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

web/src/services/chat-service.ts

@@ -19,6 +19,7 @@ const {
   createExternalConversation,
   getExternalConversation,
   completeExternalConversation,
+  uploadAndParseExternal,
 } = api;
 
 const methods = {
@@ -86,6 +87,10 @@ const methods = {
     url: completeExternalConversation,
     method: 'post',
   },
+  uploadAndParseExternal: {
+    url: uploadAndParseExternal,
+    method: 'post',
+  },
 } as const;
 
 const chatService = registerServer<keyof typeof methods>(methods, request);