[Feature Request] Support for using Caprine with Facebook Messages

[Piscium]

Currently there is a configuration option for Work Chat: Messenger for Workplace that uses https://www.facebook.com/workplace . One can switch to it in the Caprine File menu.

The request is to add a new configuration option to use https://www.facebook.com/messages .

This is useful for people that don't want to use the Messenger phone app.

See this issue: #2138