Make Google Chat like Slack

This is for people who get used to Slack to engage Google Chat with seamless experience.

This is inspired by the Chrome Extension "Google Chat thread links & quote reply".

https://chrome.google.com/webstore/detail/google-chat-thread-links/aogkhbmeeckelbhfemleoajbglamokbc?hl=en

But since thread is only one of many pain points we are facing day to day, why not take one step further to have more fancy features such as folding threads, thread heading, reply numbers, etc.

I will take baby steps to include all those features and more.

Functionalities:
- thread link
- quick reply
- thread heading
- folding threads
- reply numbers