Clickable links for opening links in an external browser

[mscharley]

Is your feature request related to a problem? Please describe.
Given a markdown link like [Google](https://google.com/) it would be nice to be able to open this link without having to copy/paste the URL out into a browser.

Describe the solution you'd like

One or both of the following:

1. Ctrl/Cmd + Click to open.
2. A decoration with the 'external link' icon and clicking the icon opens the link.

It's important that a standard click on the link text does not open the link as this would very quickly interfere with editing of the document.

Describe alternatives you've considered
None.

Additional context