Test virtual document links

[jrieken]

• any os @bpasero
• any os @kieferrm
  Add support for internal links in previewHtml #3676, make sure links in virtual document. Test that:
• you link to a document on disk, e.g file:///Users/far/b.oo
• you link to a virtual document, e.g. virtual:some/path
• you can jump to a line using the #L32 notion, file:///Users/far/b.oo#L42
• you can invoke a command using using the command scheme and the command as path, like so command:deleteLeft
• you can invoke a command with arguments by adding a JSON-array of them as query

[bpasero]

@jrieken can you give an example for how a link needs to look like if you want to execute a command?

[bpasero]

Nevermind, found it! E.g. "a href='command:workbench.action.zoomIn'"