[Bug]: Add warning about DTS

[derrickmehaffy]

What issue are you experiencing?

We have confirmed that if you are using socket.io or websocket server it will "steal" the websockets used for the DTS feature. Can you add a warning about this?

Related documentation PR: strapi/documentation#1960

It's not just this plugin but any implementation of socket.io will cause this problem and we don't have a good workaround for now.

Steps To Reproduce

1. Install io plugin
2. Attempt to perform a yarn strapi transfer between two strapi instances
3. See socket hang up error

What version of the plugin are you using?

2.0.4

What strapi version are you using?

4.15.5