Support Web app authorization for Google Tool

[ObsisMc]

Feature Description

Support web app authorization for GoogleCalendarToolSpec from llama_index.tools.google.

In addition, I find though the tool can cache token, it cannot handle the situation where the token has expired and if it happens, the tool just tells me the token is expired rather than jumping into the authorization page.

Reason

I am using GoogleCalendarToolSpec from llama_index.tools.google. However, it seems it only supports desktop app (installed app) authorization and the redirected URL can only be local, so I cannot depoly it on cloud server.

Value of Feature

No response