Ability to insert custom (non-standard) URL protocols

Description

As a Confluence user, I would like to be able to create links with custom URL protocols that are used by other applications for eg. Hansoft.
Currently, Confluence does not work with custom protocols and the link is never created.

Why is this important

Companies tend to use different applications that use different protocols for their interactions. Having Confluence work with those can improve productivity, ease of use and more seamlessly jump from one app to another.

Confluence pages with skype links which will open Skype and start call
Or a list of slack channels list with their descriptions where every channel name is a link pointing to slack and will open this channel immediately for you