Webhook support

[anoop-b]

Some sort of sync support would be nice. Webhook support would be a good start imo.

[sakethpathike]

I'm working on a server that can be self-hosted, other clients (if any) can read the changes made by other clients (a typical web socket implementation), if the client isn't online, it can later read it via a certain endpoint (didn't implemented this yet, will implement a typical delta sync stuff)